Da Vinci - Documentation Templates and Rules
2.2.0 - STU 2.2

Da Vinci - Documentation Templates and Rules, published by HL7 International / Clinical Decision Support. This guide is not an authorized publication; it is the continuous build for version 2.2.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/davinci-dtr/ and changes regularly. See the Directory of published versions

## Resource Profile: DTR Standard Questionnaire - XML Profile

Page standards status: Trial-use | Maturity Level: 2

XML representation of the dtr-std-questionnaire resource profile.

Raw xml | Download

    <StructureDefinition xmlns="http://hl7.org/fhir">
      <id value="dtr-std-questionnaire"/>
      <language value="en"/>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition dtr-std-questionnaire</b></p><a name="dtr-std-questionnaire"> </a><a name="hcdtr-std-questionnaire"> </a><table border="0" cellpadding="0" cellspacing="0" style="border: 0px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top;"><tr style="border: 1px #F0F0F0 solid; font-size: 11px; font-family: verdana; vertical-align: top"><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="The logical name of the element">Name</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Information about the use of the element">Flags</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Minimum and Maximum # of times the element can appear in the instance">Card.</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px; width: 100px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Reference to the type of the element">Type</a></th><th style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; padding-top: 3px; padding-bottom: 3px" class="hierarchy"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Additional information about the element">Description &amp; Constraints</a><span style="float: right"><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/></a></span></th></tr><tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck1.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_resource.png" alt="." style="background-color: white; background-color: inherit" title="Resource" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire">Questionnaire</a><a name="Questionnaire"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="StructureDefinition-dtr-base-questionnaire.html">DTRBaseQuestionnaire</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">A structured set of questions</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck01.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item">item</a><a name="Questionnaire.item"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">1..<span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#BackboneElement">BackboneElement</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Questions and sections within the Questionnaire</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck013.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice.png" alt="." style="background-color: white; background-color: inherit" title="Slice Definition" class="hierarchy"/> Slices for extension<a name="Questionnaire.item.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Content/Rules for all slices</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0134.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.extension:enableWhenExpression" title="Extension URL = http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression">extension:enableWhenExpression</a><a name="Questionnaire.item.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Expression for when to enable the item</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/uv/sdc/STU4/StructureDefinition-sdc-questionnaire-enableWhenExpression.html">http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0124.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.extension:answerOptionsToggleExpression" title="Extension URL = http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerOptionsToggleExpression">extension:answerOptionsToggleExpression</a><a name="Questionnaire.item.extension.3"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">(Complex)</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Expression constraining allowed answers</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/uv/sdc/STU4/StructureDefinition-sdc-questionnaire-answerOptionsToggleExpression.html">http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerOptionsToggleExpression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck011.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.text">text</a><a name="Questionnaire.item.text"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0103.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice.png" alt="." style="background-color: white; background-color: inherit" title="Slice Definition" class="hierarchy"/> Slices for extension<a name="Questionnaire.item.text.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">Content/Rules for all slices</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck01024.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.text.extension:itemTextCqfExpression" title="Extension URL = http://hl7.org/fhir/StructureDefinition/cqf-expression">extension:itemTextCqfExpression</a><a name="Questionnaire.item.text.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">An dynamic expression</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-cqf-expression.html">http://hl7.org/fhir/StructureDefinition/cqf-expression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck010.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.enableWhen">enableWhen</a><a name="Questionnaire.item.enableWhen"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="padding-left: 3px; padding-right: 3px; color: white; background-color: red" title="This element must be supported">S</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#BackboneElement">BackboneElement</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Only allow data when</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck011.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.required">required</a><a name="Questionnaire.item.required"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0101.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.required.value">value</a><a name="Questionnaire.item.required.value"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#boolean">boolean</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Primitive value for boolean</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck01003.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_extension_simple.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Simple Extension" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.required.value.extension">Slices for extension</a><a name="Questionnaire.item.required.value.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/extensibility.html#Extension">Extension</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Extension</span><br/><span style="font-weight:bold">Slice: </span>Unordered, Open by value:url</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck010024.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.required.value.extension:requiredExpression" title="Extension URL = http://hl7.org/fhir/StructureDefinition/cqf-expression">extension:requiredExpression</a><a name="Questionnaire.item.required.value.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">An dynamic expression</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-cqf-expression.html">http://hl7.org/fhir/StructureDefinition/cqf-expression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck011.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.repeats">repeats</a><a name="Questionnaire.item.repeats"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0101.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.repeats.value">value</a><a name="Questionnaire.item.repeats.value"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#boolean">boolean</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Primitive value for boolean</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck01003.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_extension_simple.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Simple Extension" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.repeats.value.extension">Slices for extension</a><a name="Questionnaire.item.repeats.value.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/extensibility.html#Extension">Extension</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Extension</span><br/><span style="font-weight:bold">Slice: </span>Unordered, Open by value:url</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck010024.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.repeats.value.extension:repeatsExpression" title="Extension URL = http://hl7.org/fhir/StructureDefinition/cqf-expression">extension:repeatsExpression</a><a name="Questionnaire.item.repeats.value.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">An dynamic expression</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-cqf-expression.html">http://hl7.org/fhir/StructureDefinition/cqf-expression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck011.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.readOnly">readOnly</a><a name="Questionnaire.item.readOnly"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0101.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.readOnly.value">value</a><a name="Questionnaire.item.readOnly.value"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#boolean">boolean</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Primitive value for boolean</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck01003.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_extension_simple.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Simple Extension" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.readOnly.value.extension">Slices for extension</a><a name="Questionnaire.item.readOnly.value.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/extensibility.html#Extension">Extension</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Extension</span><br/><span style="font-weight:bold">Slice: </span>Unordered, Open by value:url</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck010024.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vline.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.readOnly.value.extension:readOnlyExpression" title="Extension URL = http://hl7.org/fhir/StructureDefinition/cqf-expression">extension:readOnlyExpression</a><a name="Questionnaire.item.readOnly.value.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">An dynamic expression</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-cqf-expression.html">http://hl7.org/fhir/StructureDefinition/cqf-expression</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck001.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.answerValueSet">answerValueSet</a><a name="Questionnaire.item.answerValueSet"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck0001.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.answerValueSet.value">value</a><a name="Questionnaire.item.answerValueSet.value"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#string">string</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Primitive value for canonical</span></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck00003.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_extension_simple.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Simple Extension" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.answerValueSet.value.extension">Slices for extension</a><a name="Questionnaire.item.answerValueSet.value.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/extensibility.html#Extension">Extension</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">Extension</span><br/><span style="font-weight:bold">Slice: </span>Unordered, Open by value:url</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck000024.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin_end_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-dtr-std-questionnaire-definitions.html#Questionnaire.item.answerValueSet.value.extension:answerValueSetExpression" title="Extension URL = http://hl7.org/fhir/StructureDefinition/cqf-expression">extension:answerValueSetExpression</a><a name="Questionnaire.item.answerValueSet.value.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Expression">Expression</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">An dynamic expression</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-cqf-expression.html">http://hl7.org/fhir/StructureDefinition/cqf-expression</a></td></tr>
    <tr><td colspan="5" class="hierarchy"><br/><a href="https://build.fhir.org/ig/FHIR/ig-guidance/readingIgs.html#table-views" title="Legend for this format"><img src="data:image/png;base64, " alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
      </text>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-wg">
        <valueCode value="cds"/>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm">
        <valueInteger value="2">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
            <valueCanonical
                            value="http://hl7.org/fhir/us/davinci-dtr/ImplementationGuide/hl7.fhir.us.davinci-dtr"/>
          </extension>
        </valueInteger>
      </extension>
      <extension
                 url="http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status">
        <valueCode value="trial-use">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom">
            <valueCanonical
                            value="http://hl7.org/fhir/us/davinci-dtr/ImplementationGuide/hl7.fhir.us.davinci-dtr"/>
          </extension>
        </valueCode>
      </extension>
      <url
           value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-std-questionnaire"/>
      <version value="2.2.0"/>
      <name value="DTRStdQuestionnaire"/>
      <title value="DTR Standard Questionnaire"/>
      <status value="active"/>
      <date value="2026-03-27T15:13:55+00:00"/>
      <publisher value="HL7 International / Clinical Decision Support"/>
      <contact>
        <name value="HL7 International / Clinical Decision Support"/>
        <telecom>
          <system value="url"/>
          <value value="http://www.hl7.org/Special/committees/dss"/>
        </telecom>
      </contact>
      <description
                   value="Takes a subset of extensions and constraints from the SDC [rendering](http://hl7.org/fhir/uv/sdc/STU3/StructureDefinition-sdc-questionnaire-render.html), [behavior](http://hl7.org/fhir/uv/sdc/STU3/StructureDefinition-sdc-questionnaire-behave.html), and [population](http://hl7.org/fhir/uv/sdc/STU3/StructureDefinition-sdc-questionnaire-pop-exp.html) profiles, reflecting agreed expectations around which data elements might be relevant as well as which must be supported for DTR purposes."/>
      <jurisdiction>
        <coding>
          <system value="urn:iso:std:iso:3166"/>
          <code value="US"/>
        </coding>
      </jurisdiction>
      <fhirVersion value="4.0.1"/>
      <mapping>
        <identity value="ihe-sdc"/>
        <name value="IHE SDC"/>
      </mapping>
      <mapping>
        <identity value="workflow"/>
        <uri value="http://hl7.org/fhir/workflow"/>
        <name value="Workflow Pattern"/>
      </mapping>
      <mapping>
        <identity value="rim"/>
        <uri value="http://hl7.org/v3"/>
        <name value="RIM Mapping"/>
      </mapping>
      <mapping>
        <identity value="w5"/>
        <uri value="http://hl7.org/fhir/fivews"/>
        <name value="FiveWs Pattern Mapping"/>
      </mapping>
      <mapping>
        <identity value="objimpl"/>
        <uri value="http://hl7.org/fhir/object-implementation"/>
        <name value="Object Implementation Information"/>
      </mapping>
      <mapping>
        <identity value="v2"/>
        <uri value="http://hl7.org/v2"/>
        <name value="HL7 v2 Mapping"/>
      </mapping>
      <kind value="resource"/>
      <abstract value="false"/>
      <type value="Questionnaire"/>
      <baseDefinition
                      value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
      <derivation value="constraint"/>
      <snapshot>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
          <valueString value="2.2.0"/>
        </extension>
        <element id="Questionnaire">
          <path value="Questionnaire"/>
          <short value="A structured set of questions"/>
          <definition
                      value="A structured set of questions intended to guide the collection of answers from end-users. Questionnaires provide detailed control over order, presentation, phraseology and grouping to allow coherent, consistent data collection."/>
          <alias value="Form"/>
          <alias value="CRF"/>
          <alias value="Survey"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <constraint>
            <key value="dom-2"/>
            <severity value="error"/>
            <human
                   value="If the resource is contained in another resource, it SHALL NOT contain nested Resources"/>
            <expression value="contained.contained.empty()"/>
            <xpath value="not(parent::f:contained and f:contained)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-3"/>
            <severity value="error"/>
            <human
                   value="If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource"/>
            <expression
                        value="contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()"/>
            <xpath
                   value="not(exists(for $id in f:contained/*/f:id/@value return $contained[not(parent::*/descendant::f:reference/@value=concat('#', $contained/*/id/@value) or descendant::f:reference[@value='#'])]))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-4"/>
            <severity value="error"/>
            <human
                   value="If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated"/>
            <expression
                        value="contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()"/>
            <xpath
                   value="not(exists(f:contained/*/f:meta/f:versionId)) and not(exists(f:contained/*/f:meta/f:lastUpdated))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-5"/>
            <severity value="error"/>
            <human
                   value="If a resource is contained in another resource, it SHALL NOT have a security label"/>
            <expression value="contained.meta.security.empty()"/>
            <xpath value="not(exists(f:contained/*/f:meta/f:security))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice">
              <valueBoolean value="true"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice-explanation">
              <valueMarkdown
                             value="When a resource has no narrative, only systems that fully understand the data can display the resource to a human safely. Including a human readable representation in the resource makes for a much more robust eco-system and cheaper handling of resources by intermediary systems. Some ecosystems restrict distribution of resources to only those systems that do fully understand the resources, and as a consequence implementers may believe that the narrative is superfluous. However experience shows that such eco-systems often open up to new participants over time."/>
            </extension>
            <key value="dom-6"/>
            <severity value="warning"/>
            <human
                   value="A resource should have narrative for robust management"/>
            <expression value="text.`div`.exists()"/>
            <xpath value="exists(f:text/h:div)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="que-0"/>
            <severity value="warning"/>
            <human
                   value="Name should be usable as an identifier for the module by machine processing applications such as code generation"/>
            <expression value="name.matches('[A-Z]([A-Za-z0-9_]){0,254}')"/>
            <xpath
                   value="not(exists(f:name/@value)) or matches(f:name/@value, '[A-Z]([A-Za-z0-9_]){0,254}')"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-2"/>
            <severity value="error"/>
            <human
                   value="The link ids for groups and questions must be unique within the questionnaire"/>
            <expression value="descendants().linkId.isDistinct()"/>
            <xpath
                   value="count(descendant::f:linkId/@value)=count(distinct-values(descendant::f:linkId/@value))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="cnl-0"/>
            <severity value="warning"/>
            <human
                   value="Name should be usable as an identifier for the module by machine processing applications such as code generation"/>
            <expression
                        value="name.exists() implies name.matches('^[A-Z]([A-Za-z0-9_]){1,254}$')"/>
            <xpath
                   value="not(f:name) or matches(f:name/@value, '^[A-Z]([A-Za-z0-9_]){1,254}$')"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="sdc-2"/>
            <severity value="error"/>
            <human
                   value="If version is present, versionAlgorithm must be present."/>
            <expression
                        value="version.exists() implies extension.where(url='http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm').exists()"/>
            <xpath
                   value="not(exists(f:version)) or exists(f:extension[@url='http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm'])"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice">
              <valueBoolean value="true"/>
            </extension>
            <key value="sdc-3"/>
            <severity value="warning"/>
            <human
                   value="Semver is the preferred version algorithm - package machinery doesn't work well with artifacts using alternate versioning schemes"/>
            <expression
                        value="extension.where(url='http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm').all(value.ofType(Coding).where(system='http://hl7.org/fhir/version-algorithm' and code='semver').exists())"/>
            <xpath
                   value="not(f:extension[@url='http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm' and not(exists(f:valueCoding[f:system/@value='http://hl7.org/fhir/version-algorithm' and f:code/@value='semver'])))"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="dtrq-6"/>
            <severity value="error"/>
            <human
                   value="If audience is 'clinical' or 'patient' then estimatedCompletionTime must contain clinicalTime."/>
            <expression
                        value="extension.exists(url = 'http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/questionnaireAudience' and (value = 'clinical' or value = 'patient')) and extension.exists(url = 'http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/estimated-completion-time') implies extension.where(url = 'http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/estimated-completion-time').extension.where(url = 'clinicalTime').exists()"/>
            <source
                    value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="Form_Package"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="Entity. Role, or Act"/>
          </mapping>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="Observation[moodCode=DEF]"/>
          </mapping>
        </element>
        <element id="Questionnaire.id">
          <path value="Questionnaire.id"/>
          <short value="Logical id of this artifact"/>
          <definition
                      value="The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes."/>
          <comment
                   value="The only time that a resource does not have an id is when it is being submitted to the server using a create operation."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="id"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.meta">
          <path value="Questionnaire.meta"/>
          <short value="Metadata about the resource"/>
          <definition
                      value="The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.meta"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Meta"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.implicitRules">
          <path value="Questionnaire.implicitRules"/>
          <short value="A set of rules under which this content was created"/>
          <definition
                      value="A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc."/>
          <comment
                   value="Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.implicitRules"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.language">
          <path value="Questionnaire.language"/>
          <short value="Language of the resource content"/>
          <definition
                      value="The base language in which the resource is written."/>
          <comment
                   value="Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies  to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.language"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://hl7.org/fhir/ValueSet/all-languages"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="Language"/>
            </extension>
            <strength value="preferred"/>
            <description value="A human language."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/languages|4.0.1"/>
          </binding>
        </element>
        <element id="Questionnaire.text">
          <path value="Questionnaire.text"/>
          <short value="Text summary of the resource, for human interpretation"/>
          <definition
                      value="A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety."/>
          <comment
                   value="Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied).  This may be necessary for data from legacy systems where information is captured as a &quot;text blob&quot; or where text is additionally entered raw or narrated and encoded information is added later."/>
          <alias value="narrative"/>
          <alias value="html"/>
          <alias value="xhtml"/>
          <alias value="display"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.text"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Narrative"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="Act.text?"/>
          </mapping>
        </element>
        <element id="Questionnaire.text.id">
          <path value="Questionnaire.text.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.text.extension">
          <path value="Questionnaire.text.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.text.status">
          <path value="Questionnaire.text.status"/>
          <short value="generated | extensions | additional | empty"/>
          <definition
                      value="The status of the narrative - whether it's entirely generated (from just the defined data or the extensions too), or whether a human authored it and it may contain additional data."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Narrative.status"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="NarrativeStatus"/>
            </extension>
            <strength value="required"/>
            <description value="The status of a resource narrative."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/narrative-status|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.text.div">
          <path value="Questionnaire.text.div"/>
          <short value="Limited xhtml content"/>
          <definition
                      value="The actual narrative content, a stripped down version of XHTML."/>
          <comment
                   value="The contents of the html element are an XHTML fragment containing only the basic html formatting elements described in chapters 7-11 and 15 of the HTML 4.0 standard, 'anchor' elements (either name or href), images and internally contained stylesheets. The XHTML content SHALL NOT contain a head, a body, external stylesheet references, scripts, forms, base/link/xlink, frames, iframes and objects."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Narrative.div"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="xhtml"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="txt-1"/>
            <severity value="error"/>
            <human
                   value="The narrative SHALL contain only the basic html formatting elements and attributes described in chapters 7-11 (except section 4 of chapter 9) and 15 of the HTML 4.0 standard, &lt;a&gt; elements (either name or href), images and internally contained style attributes"/>
            <expression value="htmlChecks()"/>
            <xpath
                   value="not(descendant-or-self::*[not(local-name(.)=('a', 'abbr', 'acronym', 'b', 'big', 'blockquote', 'br', 'caption', 'cite', 'code', 'col', 'colgroup', 'dd', 'dfn', 'div', 'dl', 'dt', 'em', 'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'hr', 'i', 'img', 'li', 'ol', 'p', 'pre', 'q', 'samp', 'small', 'span', 'strong', 'sub', 'sup', 'table', 'tbody', 'td', 'tfoot', 'th', 'thead', 'tr', 'tt', 'ul', 'var'))]) and not(descendant-or-self::*/@*[not(name(.)=('abbr', 'accesskey', 'align', 'alt', 'axis', 'bgcolor', 'border', 'cellhalign', 'cellpadding', 'cellspacing', 'cellvalign', 'char', 'charoff', 'charset', 'cite', 'class', 'colspan', 'compact', 'coords', 'dir', 'frame', 'headers', 'height', 'href', 'hreflang', 'hspace', 'id', 'lang', 'longdesc', 'name', 'nowrap', 'rel', 'rev', 'rowspan', 'rules', 'scope', 'shape', 'span', 'src', 'start', 'style', 'summary', 'tabindex', 'title', 'type', 'valign', 'value', 'vspace', 'width'))])"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire|4.0.0"/>
          </constraint>
          <constraint>
            <key value="txt-2"/>
            <severity value="error"/>
            <human value="The narrative SHALL have some non-whitespace content"/>
            <expression value="htmlChecks()"/>
            <xpath
                   value="descendant::text()[normalize-space(.)!=''] or descendant::h:img[@src]"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire|4.0.0"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.contained">
          <path value="Questionnaire.contained"/>
          <short value="Contained, inline Resources"/>
          <definition
                      value="These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope."/>
          <comment
                   value="This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels."/>
          <alias value="inline resources"/>
          <alias value="anonymous resources"/>
          <alias value="contained resources"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.contained"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Resource"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension">
          <path value="Questionnaire.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:terminologyServer">
          <path value="Questionnaire.extension"/>
          <sliceName value="terminologyServer"/>
          <short value="Preferred terminology server"/>
          <definition
                      value="Indicates the terminology server(s) that are known to be capable of returning and potentially expanding the value set(s) associated with the resource or a particular portion of the resource (depending on where the extension appears).  If a full URL is not provided AND the requested query is a terminology operation (e.g. $lookup or $expand) the client SHOULD execute the operation against (one of) the preferredTerminologyServer(s) rather than the local repository. Systems SHOULD evaluate value sets using terminology servers as follows:  First, try any terminology servers declared on the element in question.  If there are more then one, try them in the order they appear.  Then try any servers that appear on ancestor elements in order of closest ancestor up to any on the resource root  If there are no declared servers or none of the ones listed provide a useful response, the form filler may then try any of the typical servers it would normally use.  A 'useful response' means a response that provides a valid (though potentially empty) expansion.  Clients MAY wish to log/report errors returned by terminology servers."/>
          <comment
                   value="Multiple repetitions are available to support availability (one server might be down) as well as to accommodate the possibility that different servers might be needed for different value sets.  In either case, client behavior is to try different servers from the available list until one is successful.  There is no implication to the order in which the servers are listed.  If no service is listed and terminology services are needed, the $expand operation should be invoked on the base URL for the payer."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/preferredTerminologyServer|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:versionAlgorithm">
          <path value="Questionnaire.extension"/>
          <sliceName value="versionAlgorithm"/>
          <short value="How to compare versions"/>
          <definition
                      value="Indicates the mechanism used to compare versions to determine which is more current."/>
          <comment
                   value="If set as a string, this is a FHIRPath expression that has two additional context variables passed in - %version1 and %version2 and will return a negative number if version1 is newer, a positive number if version2 and a 0 if the version ordering can't be successfully be determined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/artifact-versionAlgorithm|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:copyrightLabel">
          <path value="Questionnaire.extension"/>
          <sliceName value="copyrightLabel"/>
          <short value="Copyright holder and year(s)"/>
          <definition
                      value="A short string (&lt;50 characters), suitable for inclusion in a page footer that identifies the copyright holder, effective period, and optionally whether rights are resctricted. (e.g. 'All rights reserved', 'Some rights reserved')."/>
          <comment
                   value="Defines the content expected to be rendered in all representations of the artifact. The (c) symbol should NOT be included in this string. It is expected to be added by software when rendering the notation. Full details about licensing, restrictions, warrantees, etc. goes in the more general 'copyright' element."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/artifact-copyrightLabel|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:designNote">
          <path value="Questionnaire.extension"/>
          <sliceName value="designNote"/>
          <short value="Design comments"/>
          <definition
                      value="Information captured by the author/maintainer of the questionnaire for development purposes, not intended to be seen by users."/>
          <comment
                   value="Allows capture of todos, rationale for design decisions, etc.  It can also be used to capture comments about the completion of the form in general. Allows commentary to be captured during the process of answering a questionnaire (if not already supported by the form design) as well as after the form is completed. Comments are not part of the &quot;data&quot; of the form. If a form prompts for a comment, this should be captured in an answer, not in this element. Formal assessments of the QuestionnaireResponse would use [[[Observation]]]."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/designNote|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:performerType">
          <path value="Questionnaire.extension"/>
          <sliceName value="performerType"/>
          <short value="Resource that can record answers to this Questionnaire"/>
          <definition
                      value="Indicates the types of resources that can record answers to a Questionnaire. Open Issue: Should this extension be moved to core?"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-performerType|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:assemble-expectation">
          <path value="Questionnaire.extension"/>
          <sliceName value="assemble-expectation"/>
          <short value="Questionnaire is modular"/>
          <definition
                      value="If present, indicates that this questionnaire has expectations with respect to assembly.  Specifically, indicates whether this form requires assembly (i.e. it can't be used directly without invoking the [$assemble](http://hl7.org/fhir/uv/sdc/STU4/OperationDefinition-Questionnaire-assemble.html) operation operation on it) and/or whether it is intended for use only as a 'child' in an assembly process.  The assembly processs might mean filling in item metadata based on information looked up from item.definitions and/or retrieving sub-questionnaires pointed to by [sub-questionnaire](http://hl7.org/fhir/uv/sdc/STU4/StructureDefinition-sdc-questionnaire-subQuestionnaire.html) extensions."/>
          <comment
                   value="SDC-conformant Questionnaires **SHALL** declare this extension if they require an assembly process prior to use.  If not declared, then the Questionnaire is not necessarily safe for use as a child form and does not require assembly prior to use."/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-assemble-expectation|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:estimatedCompletionTime">
          <path value="Questionnaire.extension"/>
          <sliceName value="estimatedCompletionTime"/>
          <short value="Extension"/>
          <definition
                      value="Provides information about the typical completion time for the form. (Refer to the [Guidelines for estimated time to complete a DTR questionnaire](operational.html#guidelines-for-estimated-time-to-complete-a-dtr-questionnaire))"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/estimated-completion-time"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:audience">
          <path value="Questionnaire.extension"/>
          <sliceName value="audience"/>
          <short value="Questionnaire Audience"/>
          <definition
                      value="Provides a code to express the intended audience for the Questionnaire form."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/questionnaireAudience"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:RequestSpecific">
          <path value="Questionnaire.extension"/>
          <sliceName value="RequestSpecific"/>
          <short value="Request Specific Flag"/>
          <definition
                      value="If this flag is 'true' then a distinct QuestionnaireResponse is needed for each request where that Questionnaire is solicited.  If false, then a single QuestionnaireResponse can be used across all requests where the specified Questionnaire url and version was solicited.  (i.e., You can fill out the form once and re-use rather than completing multiple times.  Typically, re-use of a form is limited to the scope of a single encounter)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/request-specific"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:styleSensitive">
          <path value="Questionnaire.extension"/>
          <sliceName value="styleSensitive"/>
          <short value="Are styles important for processing?"/>
          <definition
                      value="Indicates that the style extensions (style, markdown and xhtml) in this resource instance are essential to the interpretation of the instance and that systems that are not capable of rendering using those extensions should not be used to render the resource."/>
          <comment
                   value="If set to true, all systems that claim to support this extension and that render elements from the resource SHALL either render the content as required by the style extensions (style, xhtml and markdown or shall indicate to the user that the resource (or specific elements in the resource) cannot be appropriately rendered by the system."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-styleSensitive|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:styleSensitive.id">
          <path value="Questionnaire.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:styleSensitive.extension">
          <path value="Questionnaire.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:styleSensitive.url">
          <path value="Questionnaire.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri
                    value="http://hl7.org/fhir/StructureDefinition/rendering-styleSensitive"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:styleSensitive.value[x]">
          <path value="Questionnaire.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <patternBoolean value="false"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:signatureRequired">
          <path value="Questionnaire.extension"/>
          <sliceName value="signatureRequired"/>
          <short value="There's a cost to support this."/>
          <definition
                      value="Indicates that a signature (of the specified type) is needed when completing the QuestionnaireResponse."/>
          <comment
                   value="If this appears at the Questionnaire level, then the signature will be gathered for the entire form when it is marked complete.  If it appears on a particular item, then it will be gathered on that question or group when it is filled in.  (E.g. seeking the user's initials beside certain questions.)

    The signature can be captured using the http://hl7.org/fhir/StructureDefinition/questionnaireresponse-signature extension.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#signatureRequired)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-signatureRequired|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:variable">
          <path value="Questionnaire.extension"/>
          <sliceName value="variable"/>
          <short value="Variable for processing"/>
          <definition
                      value="Variable specifying a logic to generate a variable for use in subsequent logic.  The name of the variable will be added to FHIRPath's context when processing descendants of the element that contains this extension as well as extensions within the same element."/>
          <comment
                   value="Ordering of variable extension declarations is significant as variables declared in one repetition of this extension might be used in subsequent extension repetitions

    For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#variable)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/variable|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:constraint">
          <path value="Questionnaire.extension"/>
          <sliceName value="constraint"/>
          <short value="A constraint on the target resource"/>
          <definition
                      value="Specifies a constraint that is enforced on instantiated (or target) resources. This extension can be applied to definitional resources (such as ActivityDefinition or Measure) and indicates that the constraint should be enforced on resources that are instantiated from the definition."/>
          <comment
                   value="Can be used on any definitional artifact to define a constraint that is enforced in the context of an instantiated resource. The constraint expression will have access to `%target` and `%definition` variables, where target is the instantiated resource, and definition is the definition used to instantiate."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/targetConstraint|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:cqf-library">
          <path value="Questionnaire.extension"/>
          <sliceName value="cqf-library"/>
          <short
                 value="The library can contain CQL, FHIRPath or x-fhir-query. The implementers must handle any of the above."/>
          <definition
                      value="A reference to a Library containing the formal logic used by the artifact."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-library)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-library|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:cqf-library.id">
          <path value="Questionnaire.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:cqf-library.extension">
          <path value="Questionnaire.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:cqf-library.url">
          <path value="Questionnaire.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri value="http://hl7.org/fhir/StructureDefinition/cqf-library"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:cqf-library.value[x]">
          <path value="Questionnaire.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-library|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.extension:launchContext">
          <path value="Questionnaire.extension"/>
          <sliceName value="launchContext"/>
          <short value="Context resources needed for Questionnaire"/>
          <definition
                      value="Resources that provide context for form processing logic (pre-population, flow-control, drop-down selection, etc.) when creating/displaying/editing a QuestionnaireResponse."/>
          <comment
                   value="3 of these launch contexts are aligned with the existing SMART on FHIR &quot;launch&quot; contexts."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-launchContext|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:itemPopulationContext">
          <path value="Questionnaire.extension"/>
          <sliceName value="itemPopulationContext"/>
          <short value="Establishes mapping context for a Questionnaire item"/>
          <definition
                      value="Specifies a query or other expression that identifies the resource (or set of resources for a repeating item) that should be used to support the population of this Questionnaire or Questionnaire.item on initial population.  When populating the questionnaire, it will set the specified variable name to that resource repetition for use in processing items within the group."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemPopulationContext|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:entryMode">
          <path value="Questionnaire.extension"/>
          <sliceName value="entryMode"/>
          <short value="sequential | prior-edit | random"/>
          <definition
                      value="Indicates how questions within the questionnaire should be presented to the end-user.  Specifically, differentiates whether the questions should be displayed one-at-a-time with no ability to adjust prior entries; one-at-a-time or continuously expanding where all questions up to the current question can be looked at and edited, or random, where all questions can be seen and the questions can be filled out in any order desired."/>
          <comment
                   value="The prior-edit functionality can be accomplished by adding questions to the screen as each subsequent question is answered (resulting in all questions being displayed in a single screen) or with a view that shows only one question at a time but allows backward navigation to view and/or edit prior answers."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-entryMode|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.extension:endpoint">
          <path value="Questionnaire.extension"/>
          <sliceName value="endpoint"/>
          <short value="Where to send answers"/>
          <definition
                      value="The base URL for the server to which questionnaire response associated with this questionnaire should be submitted. If multiple repetitions are present, the completed form should be sent to all listed endpoints."/>
          <comment
                   value="Indicates that the form has been designed with an expectation that it will be submitted to the specified URI.  If multiple endpoints are specified, expectation is that answers are submitted to all endpoints.

    If no end-point is specified, then the form is not exclusively designed to be submitted to a specific site.  If and where the form needs to be submitted or how the form should be internally processed must be inferred from external context or system business rules.

    Endpoints may have expectations around authorization, etc.  Some of this may be learned by consulting the CapabilityStatement associated with the endpoint."/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-endpoint|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.modifierExtension">
          <path value="Questionnaire.modifierExtension"/>
          <short value="Extensions that cannot be ignored"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.url">
          <path value="Questionnaire.url"/>
          <short
                 value="Canonical identifier for this questionnaire, represented as a URI (globally unique)"/>
          <definition
                      value="An absolute URI that is used to identify this questionnaire when it is referenced in a specification, model, design or an instance; also called its canonical identifier. This SHOULD be globally unique and SHOULD be a literal address at which at which an authoritative instance of this questionnaire is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the questionnaire is stored on different servers."/>
          <comment
                   value="The name of the referenced questionnaire can be conveyed using the http://hl7.org/fhir/StructureDefinition/display extension."/>
          <requirements
                        value="…  This is the id that will be used to link a QuestionnaireResponse to the Questionnaire the response is for."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.url"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="cnl-1"/>
            <severity value="warning"/>
            <human
                   value="Warning	Questionnaire.url	URL should not contain | or # - these characters make processing canonical references problematic"/>
            <expression value="exists() implies matches('^[^|# ]+$')"/>
            <xpath value="not(@value) or matches(@value, '^[^|# ]+$')"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.url"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.identifier"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".identifier[scope=BUSN;reliability=ISS]"/>
          </mapping>
        </element>
        <element id="Questionnaire.identifier">
          <path value="Questionnaire.identifier"/>
          <short value="Additional identifier for the questionnaire"/>
          <definition
                      value="A formal identifier that is used to identify this questionnaire when it is represented in other formats, or referenced in a specification, model, design or an instance."/>
          <comment
                   value="Typically, this is used for identifiers that can go in an HL7 V3 II (instance identifier) data type, and can then identify this questionnaire outside of FHIR, where it is not possible to use the logical URI."/>
          <requirements
                        value="Allows externally provided and/or usable business identifiers to be easily associated with the module."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.identifier"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Identifier"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.identifier"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.identifier"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".identifier"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.version">
          <path value="Questionnaire.version"/>
          <short value="Business version of the questionnaire"/>
          <definition
                      value="The identifier that is used to identify this version of the questionnaire when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the questionnaire author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions can be placed in a lexicographical sequence."/>
          <comment
                   value="There may be different questionnaire instances that have the same identifier but different versions.  The version can be appended to the url in a reference to allow a reference to a particular business version of the questionnaire with the format [url]|[version]."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.version"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="Not currently in schema"/>
          </mapping>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.version"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.version"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (to add?)"/>
          </mapping>
        </element>
        <element id="Questionnaire.name">
          <path value="Questionnaire.name"/>
          <short value="Name for this questionnaire (computer friendly)"/>
          <definition
                      value="A natural language name identifying the questionnaire. This name should be usable as an identifier for the module by machine processing applications such as code generation."/>
          <comment
                   value="The name is not expected to be globally unique. The name should be a simple alphanumeric type name to ensure that it is machine-processing friendly."/>
          <requirements value="Support human navigation and code generation."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <condition value="inv-0"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.title">
          <path value="Questionnaire.title"/>
          <short value="Name for this questionnaire (human friendly)"/>
          <definition
                      value="A short, descriptive, user-friendly title for the questionnaire."/>
          <comment
                   value="This name does not need to be machine-processing friendly and may contain punctuation, white-space, etc."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.title"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.title"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".title"/>
          </mapping>
        </element>
        <element id="Questionnaire.derivedFrom">
          <path value="Questionnaire.derivedFrom"/>
          <short value="Instantiates protocol or definition"/>
          <definition
                      value="The URL of a Questionnaire that this Questionnaire is based on."/>
          <requirements
                        value="Allows a Questionnaire to be created based on another Questionnaire."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.derivedFrom"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Questionnaire|4.0.1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.derivedFrom"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=DRIV].target[classCode=OBS, moodCode=DEFN]"/>
          </mapping>
        </element>
        <element id="Questionnaire.status">
          <path value="Questionnaire.status"/>
          <short value="draft | active | retired | unknown"/>
          <definition
                      value="The status of this questionnaire. Enables tracking the life-cycle of the content."/>
          <comment
                   value="Allows filtering of questionnaires that are appropriate for use versus not."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.status"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="true"/>
          <isModifierReason
                            value="This is labeled as &quot;Is Modifier&quot; because applications should not use a retired {{title}} without due consideration"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="PublicationStatus"/>
            </extension>
            <strength value="required"/>
            <description value="The lifecycle status of an artifact."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/publication-status|4.0.1"/>
          </binding>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="./administration_package/registration/state/registration_status"/>
          </mapping>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.status"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.status"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".status"/>
          </mapping>
        </element>
        <element id="Questionnaire.experimental">
          <path value="Questionnaire.experimental"/>
          <short value="For testing purposes, not real usage"/>
          <definition
                      value="A Boolean value to indicate that this questionnaire is authored for testing purposes (or education/evaluation/marketing) and is not intended to be used for genuine usage."/>
          <comment
                   value="Allows filtering of questionnaires that are appropriate for use versus not."/>
          <requirements
                        value="Enables experimental content to be developed following the same lifecycle that would be used for a production-level questionnaire."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.experimental"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.experimental"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.class"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.subjectType">
          <path value="Questionnaire.subjectType"/>
          <short value="Resource that can be subject of QuestionnaireResponse"/>
          <definition
                      value="The types of subjects that can be the subject of responses created for the questionnaire."/>
          <comment value="If none are specified, then the subject is unlimited."/>
          <requirements
                        value="A Questionnaire SHOULD specify the subject. However, it is optional to support legacy questionnaires."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.subjectType"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <patternCode value="Patient"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ResourceType"/>
            </extension>
            <strength value="required"/>
            <description
                         value="One of the resource types defined as part of this version of FHIR."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/resource-types|4.0.1"/>
          </binding>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.subject[x]"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=META].target[classCode=OBS, moodCode=DEFN, isCriterion=true].participation.role.classCode"/>
          </mapping>
        </element>
        <element id="Questionnaire.subjectType.id">
          <path value="Questionnaire.subjectType.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.subjectType.extension">
          <path value="Questionnaire.subjectType.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.subjectType.extension:subjectType">
          <path value="Questionnaire.subjectType.extension"/>
          <sliceName value="subjectType"/>
          <short value="R5: subjectType additional codes"/>
          <definition value="R5: `Questionnaire.subjectType` additional codes"/>
          <comment
                   value="Element `Questionnaire.subjectType` is mapped to FHIR R4 element `Questionnaire.subjectType` as `RelatedTo`.
    The mappings for `Questionnaire.subjectType` do not allow expression of the necessary codes, per the bindings on the source and target.
    If none are specified, then the subject is unlimited."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.subjectType"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Element|4.0.1"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Extension|4.0.1"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.subjectType.value">
          <path value="Questionnaire.subjectType.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for code"/>
          <definition value="Primitive value for code"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="string.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="[^\s]+(\s[^\s]+)*"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.date">
          <path value="Questionnaire.date"/>
          <short value="Date last changed"/>
          <definition
                      value="The date  (and optionally time) when the questionnaire was published. The date must change when the business version changes and it must change if the status code changes. In addition, it should change when the substantive content of the questionnaire changes."/>
          <comment
                   value="Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the questionnaire. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource."/>
          <alias value="Revision Date"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.date"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.date"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.recorded"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=AUT].time"/>
          </mapping>
        </element>
        <element id="Questionnaire.publisher">
          <path value="Questionnaire.publisher"/>
          <short value="Name of the publisher (organization or individual)"/>
          <definition
                      value="The name of the organization or individual that published the questionnaire."/>
          <comment
                   value="Usually an organization but may be an individual. The publisher (or steward) of the questionnaire is the organization or individual primarily responsible for the maintenance and upkeep of the questionnaire. This is not necessarily the same individual or organization that developed and initially authored the content. The publisher is the primary point of contact for questions or issues with the questionnaire. This item SHOULD be populated unless the information is available from context."/>
          <requirements
                        value="Helps establish the &quot;authority/credibility&quot; of the questionnaire.  May also allow for contact."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.publisher"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.publisher"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.witness"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=AUT].role"/>
          </mapping>
        </element>
        <element id="Questionnaire.contact">
          <path value="Questionnaire.contact"/>
          <short value="Contact details for the publisher"/>
          <definition
                      value="Contact details to assist a user in finding and communicating with the publisher."/>
          <comment
                   value="May be a web site, an email address, a telephone number, etc."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.contact"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="ContactDetail"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.contact"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=CALLBCK].role"/>
          </mapping>
        </element>
        <element id="Questionnaire.description">
          <path value="Questionnaire.description"/>
          <short value="Natural language description of the questionnaire"/>
          <definition
                      value="A free text natural language description of the questionnaire from a consumer's perspective."/>
          <comment
                   value="This description can be used to capture details such as why the questionnaire was built, comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the questionnaire as conveyed in the 'text' field of the resource itself. This item SHOULD be populated unless the information is available from context (e.g. the language of the questionnaire is presumed to be the predominant language in the place the questionnaire was created)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="markdown"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.description"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".text"/>
          </mapping>
        </element>
        <element id="Questionnaire.useContext">
          <path value="Questionnaire.useContext"/>
          <short value="The context that the content is intended to support"/>
          <definition
                      value="The content was developed with a focus and intent of supporting the contexts that are listed. These contexts may be general categories (gender, age, ...) or may be references to specific programs (insurance plans, studies, ...) and may be used to assist with indexing and searching for appropriate questionnaire instances."/>
          <comment
                   value="When multiple useContexts are specified, there is no expectation that all or any of the contexts apply."/>
          <requirements value="Assist in searching for appropriate content."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.useContext"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="UsageContext"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.useContext"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (to add?)"/>
          </mapping>
        </element>
        <element id="Questionnaire.jurisdiction">
          <path value="Questionnaire.jurisdiction"/>
          <short value="Intended jurisdiction for questionnaire (if applicable)"/>
          <definition
                      value="A legal or geographic region in which the questionnaire is intended to be used."/>
          <comment
                   value="It may be possible for the questionnaire to be used in jurisdictions other than those for which it was originally designed or intended."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.jurisdiction"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="Jurisdiction"/>
            </extension>
            <strength value="extensible"/>
            <description
                         value="Countries and regions within which this artifact is targeted for use."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/jurisdiction|4.0.1"/>
          </binding>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.jurisdiction"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (to add?)"/>
          </mapping>
        </element>
        <element id="Questionnaire.purpose">
          <path value="Questionnaire.purpose"/>
          <short value="Why this questionnaire is defined"/>
          <definition
                      value="Explanation of why this questionnaire is needed and why it has been designed as it has."/>
          <comment
                   value="This element does not describe the usage of the questionnaire. Instead, it provides traceability of ''why'' the resource is either needed or ''why'' it is defined as it is.  This may be used to point to source materials or specifications that drove the structure of this questionnaire."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.purpose"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="markdown"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.purpose"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.why[x]"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".reasonCode.text"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.copyright">
          <path value="Questionnaire.copyright"/>
          <short value="Use and/or publishing restrictions"/>
          <definition
                      value="A copyright statement relating to the questionnaire and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the questionnaire."/>
          <requirements
                        value="Consumers must be able to determine any legal restrictions on the use of the questionnaire and/or its content."/>
          <alias value="License"/>
          <alias value="Restrictions"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.copyright"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="markdown"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.copyright"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (to add?)"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.approvalDate">
          <path value="Questionnaire.approvalDate"/>
          <short value="When the questionnaire was approved by publisher"/>
          <definition
                      value="The date on which the resource content was approved by the publisher. Approval happens once when the content is officially approved for usage."/>
          <comment
                   value="The 'date' element may be more recent than the approval date because of minor changes or editorial corrections."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.approvalDate"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="date"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.approvalDate"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=&quot;SUBJ&quot;].act[classCode=CACT;moodCode=EVN;code=&quot;approval&quot;].effectiveTime"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.lastReviewDate">
          <path value="Questionnaire.lastReviewDate"/>
          <short value="When the questionnaire was last reviewed"/>
          <definition
                      value="The date on which the resource content was last reviewed. Review happens periodically after approval but does not change the original approval date."/>
          <comment
                   value="If specified, this date follows the original approval date."/>
          <requirements
                        value="Gives a sense of how &quot;current&quot; the content is.  Resources that have not been reviewed in a long time may have a risk of being less appropriate/relevant."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.lastReviewDate"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="date"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.lastReviewDate"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=&quot;SUBJ&quot;; subsetCode=&quot;RECENT&quot;].act[classCode=CACT;moodCode=EVN;code=&quot;review&quot;].effectiveTime"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.effectivePeriod">
          <path value="Questionnaire.effectivePeriod"/>
          <short value="When the questionnaire is expected to be used"/>
          <definition
                      value="The period during which the questionnaire content was or is planned to be in active use."/>
          <comment
                   value="The effective period for a questionnaire  determines when the content is applicable for usage and is independent of publication and review dates. For example, a measure intended to be used for the year 2016 might be published in 2015."/>
          <requirements
                        value="Allows establishing a transition before a resource comes into effect and also allows for a sunsetting  process when new versions of the questionnaire are or are expected to be used instead."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.effectivePeriod"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Period"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.effectivePeriod"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (to add?)"/>
          </mapping>
          <mapping>
            <identity value="objimpl"/>
            <map value="no-gen-base"/>
          </mapping>
        </element>
        <element id="Questionnaire.code">
          <path value="Questionnaire.code"/>
          <short value="Concept that represents the overall questionnaire"/>
          <definition
                      value="An identifier for this question or group of questions in a particular terminology such as LOINC."/>
          <requirements
                        value="Allows linking of the complete Questionnaire resources to formal terminologies.  It's common for &quot;panels&quot; of questions to be identified by a code."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.code"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Coding"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireConcept"/>
            </extension>
            <strength value="example"/>
            <description
                         value="Codes for questionnaires, groups and individual questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-questions|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value=".code"/>
          </mapping>
        </element>
        <element id="Questionnaire.item">
          <path value="Questionnaire.item"/>
          <short value="Questions and sections within the Questionnaire"/>
          <definition
                      value="A particular question, question grouping or display text that is part of the questionnaire."/>
          <comment
                   value="The content of the questionnaire is constructed from an ordered, hierarchical collection of items."/>
          <min value="1"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="que-3"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="que-1"/>
            <severity value="error"/>
            <human
                   value="Group items must have nested items, display items cannot have nested items"/>
            <expression
                        value="(type='group' implies item.empty().not()) and (type.trace('type')='display' implies item.trace('item').empty())"/>
            <xpath
                   value="not((f:type/@value='group' and not(f:item)) or (f:type/@value='display' and f:item))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-3"/>
            <severity value="error"/>
            <human value="Display items cannot have a &quot;code&quot; asserted"/>
            <expression value="type!='display' or code.empty()"/>
            <xpath value="not(f:type/@value='display' and f:code)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-4"/>
            <severity value="error"/>
            <human
                   value="A question cannot have both answerOption and answerValueSet"/>
            <expression value="answerOption.empty() or answerValueSet.empty()"/>
            <xpath value="not(f:answerValueSet and f:answerOption)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-5"/>
            <severity value="error"/>
            <human
                   value="Only 'choice' and 'open-choice' items can have answerValueSet"/>
            <expression
                        value="(type ='choice' or type = 'open-choice' or type = 'decimal' or type = 'integer' or type = 'date' or type = 'dateTime' or type = 'time' or type = 'string' or type = 'quantity') or (answerValueSet.empty() and answerOption.empty())"/>
            <xpath
                   value="f:type/@value=('choice','open-choice','decimal','integer','date','dateTime','time','string','quantity',') or not(f:answerOption or f:answerValueSet)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-6"/>
            <severity value="error"/>
            <human
                   value="Required and repeat aren't permitted for display items"/>
            <expression
                        value="type!='display' or (required.empty() and repeats.empty())"/>
            <xpath
                   value="not(f:type/@value='display' and (f:required or f:repeats))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-8"/>
            <severity value="error"/>
            <human
                   value="Initial values can't be specified for groups or display items"/>
            <expression
                        value="(type!='group' and type!='display') or initial.empty()"/>
            <xpath
                   value="not(f:type/@value=('group', 'display') and f:*[starts-with(local-name(.), 'initial')])"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-9"/>
            <severity value="error"/>
            <human
                   value="Read-only can't be specified for &quot;display&quot; items"/>
            <expression value="type!='display' or readOnly.empty()"/>
            <xpath
                   value="not(f:type/@value=('group', 'display') and f:*[starts-with(local-name(.), 'initial')])"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-10"/>
            <severity value="error"/>
            <human
                   value="Maximum length can only be declared for simple question types"/>
            <expression
                        value="(type in ('boolean' | 'decimal' | 'integer' | 'string' | 'text' | 'url' | 'open-choice')) or maxLength.empty()"/>
            <xpath
                   value="f:type/@value=('boolean', 'decimal', 'integer', 'open-choice', 'string', 'text', 'url') or not(f:maxLength)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-11"/>
            <severity value="error"/>
            <human
                   value="If one or more answerOption is present, initial[x] must be missing"/>
            <expression value="answerOption.empty() or initial.empty()"/>
            <xpath
                   value="not(f:answerOption) or not(count(f:*[starts-with(local-name(.), 'initial')]))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-12"/>
            <severity value="error"/>
            <human
                   value="If there are more than one enableWhen, enableBehavior must be specified"/>
            <expression
                        value="enableWhen.count() &gt; 2 implies enableBehavior.exists()"/>
            <xpath
                   value="not(f:answerOption) or not(count(f:*[starts-with(local-name(.), 'initial')]))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="que-13"/>
            <severity value="error"/>
            <human
                   value="Can only have multiple initial values for repeating items"/>
            <expression value="repeats=true or initial.count() &lt;= 1"/>
            <xpath value="f:repeats/@value='true' or count(f:initial)&lt;=1"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <constraint>
            <key value="sdc-1"/>
            <severity value="error"/>
            <human
                   value="An item cannot have an answerExpression if answerOption or answerValueSet is already present."/>
            <expression
                        value="extension('http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression').empty().not() implies (answerOption.empty() and answerValueSet.empty())"/>
            <xpath
                   value="f:extension[@url='http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression'] and (not(f:answerOption) and not(f:answerValueSet))"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="que-1a"/>
            <severity value="error"/>
            <human
                   value="Group items must have nested items when Questionanire is complete"/>
            <expression
                        value="(type='group' and %resource.status='complete') implies item.empty().not()"/>
            <xpath
                   value="not(f:type/@value='group' and ancestor::f:Questionnaire/f:status/@value='complete') or exists(f:item)"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="que-1b"/>
            <severity value="warning"/>
            <human value="Groups should have items"/>
            <expression value="type='group' implies item.empty().not()"/>
            <xpath value="not(f:type='group') or exists(f:item)"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="que-1c"/>
            <severity value="error"/>
            <human value="Display items cannot have child items"/>
            <expression value="type='display' implies item.empty()"/>
            <xpath value="not(f:type/@value='display') or not(exists(f:item))"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="que-14"/>
            <severity value="warning"/>
            <human
                   value="Can only have answerConstraint if answerOption, answerValueSet, or answerExpression are present. (This is a warning because other extensions may serve the same purpose)"/>
            <expression
                        value="extension('http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.answerConstraint').exists() implies answerOption.exists() or answerValueSet.exists() or extension('http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression').exists()"/>
            <xpath
                   value="not(exists(f:extension[@url='http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.answerConstraint'])) or exists(f:answerOption) or exists(f:answerValueSet) or exists(f:extension[@url='http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression'])"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <constraint>
            <key value="dtrq-2"/>
            <severity value="warning"/>
            <human
                   value="if item type is 'choice' or 'open-choice', then it should have either the answerOption, answerValueSet, or answerExpression extension"/>
            <expression
                        value="(type='choice' or type='open-choice') implies answerOption.exists() or answerValueSet.exists() or extension('http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerExpression').exists()"/>
            <source
                    value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
          </constraint>
          <constraint>
            <key value="dtrq-3"/>
            <severity value="warning"/>
            <human
                   value="if item type is Quantity, then it should have either the unitOption or unitValueSet extension"/>
            <expression
                        value="(type='quantity') implies extension.where(url='http://hl7.org/fhir/StructureDefinition/questionnaire-unitOption').exists() or extension.where(url='http://hl7.org/fhir/StructureDefinition/questionnaire-unitValueSet').exists()"/>
            <source
                    value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
          </constraint>
          <constraint>
            <key value="dtrq-4"/>
            <severity value="error"/>
            <human
                   value="if item type is Reference, then it must have a referenceResource extension"/>
            <expression
                        value="(type='reference') implies extension.where(url='http://hl7.org/fhir/StructureDefinition/questionnaire-referenceResource').exists()"/>
            <source
                    value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
          </constraint>
          <constraint>
            <key value="dtrq-5"/>
            <severity value="warning"/>
            <human
                   value="if item type is Reference, then it should have a candidateExpression extension"/>
            <expression
                        value="(type='reference') implies extension.where(url='http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression').exists()"/>
            <source
                    value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/dtr-base-questionnaire"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="./form_design/*[self::header or self::footer or self::section]"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=COMP].target[classCode=OBS, moodCode=DEF]"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.id">
          <path value="Questionnaire.item.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension">
          <path value="Questionnaire.item.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:hidden">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="hidden"/>
          <short value="Don't display to user"/>
          <definition
                      value="If true, indicates that the extended item should not be displayed to the user."/>
          <comment
                   value="If an item is hidden, all descendant items are hidden as well.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#hidden)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-hidden|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:terminologyServer">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="terminologyServer"/>
          <short value="Preferred terminology server"/>
          <definition
                      value="Indicates the terminology server(s) that are known to be capable of returning and potentially expanding the value set(s) associated with the resource or a particular portion of the resource (depending on where the extension appears).  If a full URL is not provided AND the requested query is a terminology operation (e.g. $lookup or $expand) the client SHOULD execute the operation against (one of) the preferredTerminologyServer(s) rather than the local repository. Systems SHOULD evaluate value sets using terminology servers as follows:  First, try any terminology servers declared on the element in question.  If there are more then one, try them in the order they appear.  Then try any servers that appear on ancestor elements in order of closest ancestor up to any on the resource root  If there are no declared servers or none of the ones listed provide a useful response, the form filler may then try any of the typical servers it would normally use.  A 'useful response' means a response that provides a valid (though potentially empty) expansion.  Clients MAY wish to log/report errors returned by terminology servers."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/preferredTerminologyServer|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:disabledDisplay">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="disabledDisplay"/>
          <short value="R5: hidden | protected (new)"/>
          <definition
                      value="R5: `Questionnaire.item.disabledDisplay` (new:code)"/>
          <comment
                   value="Element `Questionnaire.item.disabledDisplay` has a context of Questionnaire.item based on following the parent source element upwards and mapping to `Questionnaire`.
    Element `Questionnaire.item.disabledDisplay` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element).
    If not specified, rendering behavior is up to the client.  This element is only meaningful if enableWhen or an equivalent extension is present"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.disabledDisplay"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Element|4.0.1"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Extension|4.0.1"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:answerConstraint">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="answerConstraint"/>
          <short value="R5: optionsOnly | optionsOrType | optionsOrString (new)"/>
          <definition
                      value="R5: `Questionnaire.item.answerConstraint` (new:code)"/>
          <comment
                   value="Element `Questionnaire.item.answerConstraint` has a context of Questionnaire.item based on following the parent source element upwards and mapping to `Questionnaire`.
    Element `Questionnaire.item.answerConstraint` has no mapping targets in FHIR R4. Typically, this is because the element has been added (is a new element)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/5.0/StructureDefinition/extension-Questionnaire.item.answerConstraint"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Element|4.0.1"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Extension|4.0.1"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:designNote">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="designNote"/>
          <short value="Design comments"/>
          <definition
                      value="Information captured by the author/maintainer of the questionnaire for development purposes, not intended to be seen by users."/>
          <comment
                   value="Allows capture of todos, rationale for design decisions, etc.  It can also be used to capture comments about specific groups or questions within it. Allows commentary to be captured during the process of answering a questionnaire (if not already supported by the form design) as well as after the form is completed. Comments are not part of the &quot;data&quot; of the form. If a form prompts for a comment, this should be captured in an answer, not in this element. Formal assessments of the QuestionnaireResponse would use [[[Observation]]]."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/designNote|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:itemOptionalDisplay">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="itemOptionalDisplay"/>
          <short value="Can suppress from display to user"/>
          <definition
                      value="This extension is used when defining high-level questionnaires that will then be used as a basis for 'derived' Questionnaires that are further refined for use in specific organizations or contexts.  If the extension is present and set to 'true', it means that this item should be considered to be 'optional' from an adaptation perspective and that the question can be removed (i.e. not displayed) in derived questionnaires without impacting the validity of the instrument.  Alternatively, the element can be marked as 'hidden' and 'readOnly' and have a value or descendant item values declared using initialValue or initialExpression.  If the element with 'optionalDisplay=true' is marked as 'required=true', then this second approach is the only means to exclude the element from display."/>
          <comment
                   value="If a group or question that contains other groups or questions is marked as &quot;optional&quot;, all of its contents are automatically also treated as optional."/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-optionalDisplay|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:itemControl">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="itemControl"/>
          <short value="E.g. Fly-over, Table, Checkbox, Combo-box, Lookup, etc."/>
          <definition
                      value="The type of data entry control or structure that should be used to render the item."/>
          <comment
                   value="Different controls may be appropriate for different item types.  It is up to the system rendering a questionnaire as to what controls it will support and for which data types.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#itemControl)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-itemControl|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:choiceOrientation">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="choiceOrientation"/>
          <short value="horizontal | vertical"/>
          <definition
                      value="Identifies the desired orientation when rendering a list of choices (typically radio-box or check-box lists)."/>
          <comment
                   value="Systems may choose to wrap answers rather than attempting to display them all in one row or column.  Language conventions may determine the order in which the choices are listed (left-to-right or right-to-left, etc.).  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#choiceOrientation)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-choiceOrientation|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:displayCategory">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="displayCategory"/>
          <short value="Purpose of rendered text"/>
          <definition
                      value="Describes the intended purpose of the rendered text.  For example - instructions, guidance on access control, maintenance information, etc."/>
          <comment
                   value="See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#displayCategory)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-displayCategory|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:supportHyperlink">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="supportHyperlink"/>
          <short value="A labeled hyperlink for user guidance"/>
          <definition
                      value="A labeled hyperlink for display alongside a questionnaire item, providing supporting guidance to the user."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-supportHyperlink"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:sliderStepValue">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="sliderStepValue"/>
          <short value="Increment value for slider"/>
          <definition
                      value="For slider-based controls, indicates the step size to use when toggling the control up or down."/>
          <comment
                   value="See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#sliderStepValue)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-sliderStepValue|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:entryFormat">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="entryFormat"/>
          <short value="User prompt for format"/>
          <definition
                      value="Additional instructions for the user to guide their input (i.e. a human readable version of a regular expression like &quot;nnn-nnn-nnn&quot;). In most UIs this is the placeholder (or 'ghost') text placed directly inside the edit controls and that disappear when the control gets the focus."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#entryFormat)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/entryFormat|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:usageMode">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="usageMode"/>
          <short
                 value="capture | display | display-non-empty | capture-display | capture-display-non-empty"/>
          <definition
                      value="Identifies that the specified element should only appear in certain &quot;modes&quot; of operation."/>
          <comment
                   value="See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#usageMode)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-usageMode|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:itemSignatureRequired">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="itemSignatureRequired"/>
          <short value="Is signature needed?"/>
          <definition
                      value="Indicates that a signature (of the specified type) is needed when completing the QuestionnaireResponse."/>
          <comment
                   value="If this appears at the Questionnaire level, then the signature will be gathered for the entire form when it is marked complete.  If it appears on a particular item, then it will be gathered on that question or group when it is filled in.  (E.g. seeking the user's initials beside certain questions.)

    The signature can be captured using the http://hl7.org/fhir/StructureDefinition/questionnaireresponse-signature extension.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#signatureRequired)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-signatureRequired|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:minOccurs">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="minOccurs"/>
          <short value="Minimum repetitions"/>
          <definition
                      value="The minimum number of times the group must appear, or the minimum number of answers for a question - when greater than 1."/>
          <comment
                   value="Default assumption for &quot;required&quot; elements is minOccurs=1.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#minOccurs)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-minOccurs|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:maxOccurs">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="maxOccurs"/>
          <short value="Maximum repetitions"/>
          <definition
                      value="The maximum number of times the group must appear, or the maximum number of answers for a question - when greater than 1 and not unlimited."/>
          <comment
                   value="Only relevant if the element has repeats=true and there's a need to constrain the number of allowed repetitions.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#maxOccurs)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-maxOccurs|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:minLength">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="minLength"/>
          <short value="At least this many characters"/>
          <definition
                      value="The minimum number of characters that must be present in the simple data type to be considered a &quot;valid&quot; instance."/>
          <comment
                   value="For base64binary, reflects the number of characters representing the encoded data, not the number of bytes of the binary data.  For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#minLength)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/minLength|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:regex">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="regex"/>
          <short value="Regular expression pattern"/>
          <definition
                      value="A regular expression that defines the syntax for the data element to be considered valid."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/regex|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:minValue">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="minValue"/>
          <short value="Must be &gt;= this value"/>
          <definition
                      value="The inclusive lower bound on the range of allowed values for the data element."/>
          <comment
                   value="Data type specified must be the same as the data type for the data element.  For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#minValue)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/minValue|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:maxValue">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="maxValue"/>
          <short value="Must be &lt;= this value"/>
          <definition
                      value="The inclusive upper bound on the range of allowed values for the data element."/>
          <comment
                   value="Data type specified must be the same as the data type for the data element.  For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#maxValue)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/maxValue|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:maxDecimalPlaces">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="maxDecimalPlaces"/>
          <short value="Maximum digits after decimal"/>
          <definition
                      value="Identifies the maximum number of decimal places that may be specified for the data element."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#maxDecimalPlaces).
    This specifies the maximum number of digits that can appear after the decimal point in a number. It counts all the digits to the right of the decimal point when the number is written out in full, standard decimal form (without 'e' or 'E').
    For example, a number in scientific notation like 1.23e-4 equals 0.000123 when expanded; it would be consistent with a maximum number of decimal places of 6 or more."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/maxDecimalPlaces|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:mimeType">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="mimeType"/>
          <short value="Type of attachment"/>
          <definition
                      value="Identifies the kind(s) of attachment allowed to be sent for an element."/>
          <comment
                   value="This extension only has meaning if the element has a type of Attachment.  For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#mimeType)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/mimeType|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:maxSize">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="maxSize"/>
          <short value="Max size in bytes"/>
          <definition
                      value="For attachment answers, indicates the maximum size in bytes an attachment can be."/>
          <comment
                   value="This extension only has meaning if the element has a type of Attachment.  For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#maxSize)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/maxSize|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:unitOption">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="unitOption"/>
          <short value="Unit choice"/>
          <definition
                      value="A unit that the user may choose when providing a quantity value."/>
          <comment
                   value="Provide either unitOption(s) or unitValueSet.  If either of the extensions are present, the units for a Quantity element are constrained to only the units listed by the extensions - i.e. it is treated as a &quot;required&quot;, not an &quot;extensible&quot; binding.  In the absence of either, any unit is valid.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#unitOption).  If this extension present and an answer is provided for the question item in the QuestionnaireResponse, then the valueQuantity **SHALL** have a Quantity.code and Quantity.system that match the Coding.code and system of one of the allowed values if the Coding has a code and/or system.  If the Coding only has a display, then the Quantity.unit must match.  (Note that Coding with only a display is strongly discouraged.)  If there is a match on code and system, but no match on display/unit, systems MAY raise a warning.  However, because of translation and bandwidth considerations, some systems **MAY** opt to drop the unit or express it in an alternate language."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-unitOption|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:referenceResource">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="referenceResource"/>
          <short value="Allowed resource for reference"/>
          <definition
                      value="Where the type for a question is &quot;Reference&quot;, indicates a type of resource that is permitted."/>
          <comment
                   value="This extension only has meaning if the question.type = Reference.  If no allowedResource extensions are present, the presumption is that any type of resource is permitted.  If multiple are present, then any of the specified types are permitted.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#referenceResource)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceResource|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:referenceProfile">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="referenceProfile"/>
          <short value="Allowed profile for reference"/>
          <definition
                      value="Where the type for a question is &quot;Reference&quot;, indicates a profile that the resource instances pointed to in answers to this question must be valid against."/>
          <comment
                   value="If multiple profiles are present, then the resource must be valid against at least one of them.  See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#referenceProfile)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-referenceProfile|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:itemConstraint">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="itemConstraint"/>
          <short value="A constraint on the target resource"/>
          <definition
                      value="Specifies a constraint that is enforced on instantiated (or target) resources. This extension can be applied to definitional resources (such as ActivityDefinition or Measure) and indicates that the constraint should be enforced on resources that are instantiated from the definition."/>
          <comment
                   value="Can be used on any definitional artifact to define a constraint that is enforced in the context of an instantiated resource. The constraint expression will have access to `%target` and `%definition` variables, where target is the instantiated resource, and definition is the definition used to instantiate."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/targetConstraint|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:unit">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="unit"/>
          <short value="Unit for numeric answer"/>
          <definition
                      value="Provides a computable unit of measure associated with numeric questions to support subsequent computation on responses. This is for use on items of type integer and decimal, and it's purpose is to support converting the integer or decimal answer into a Quantity when extracting the data into a resource."/>
          <comment
                   value="The human-readable unit is conveyed as a display element.  This element is for computation purposes."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-unit|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:unitValueSet">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="unitValueSet"/>
          <short value="Unit choices"/>
          <definition
                      value="A set of units that the user may choose when providing a quantity value."/>
          <comment
                   value="Provide either unitOption(s) or unitValueSet. If either of the extensions are present, the units for a Quantity element are constrained to only the units listed by the extensions - i.e. it is treated as a &quot;required&quot;, not an &quot;extensible&quot; binding. In the absence of either, any unit is valid. See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/behavior.html#unitValueSet). If this extension present and an answer is provided for the question item in the QuestionnaireResponse, then the valueQuantity **SHALL** have a Quantity.code and Quantity.system that match the Coding.code and system of one of the allowed values if the Coding has a code and/or system. If the Coding only has a display, then the Quantity.unit must match. (Note that Coding with only a display is strongly discouraged.) If there is a match on code and system, but no match on display/unit, systems MAY raise a warning. However, because of translation and bandwidth considerations, some systems **MAY** opt to drop the unit or express it in an alternate language. Validation of the Quantity unit **MAY** be performed by using the $validateCode operation, populating the elements passed into the operation from the Quantity.code, system and unit elements."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-unitValueSet|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A (MIF-level)"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:itemMedia">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="itemMedia"/>
          <short value="Media to display"/>
          <definition
                      value="Media to render/make available as an accompaniment to the question being asked"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemMedia|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:shortText">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="shortText"/>
          <short value="Short text for the item."/>
          <definition value="The short text for the item."/>
          <comment
                   value="This element is useful for an item that require a shorter text when rendered  (e.g. when displaying the item on a mobile phone)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-shortText|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:openLabel">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="openLabel"/>
          <short value="Image to display"/>
          <definition
                      value="The label text to display beside free-text and/or unrestricted type values for an 'open' choice element.  E.g. 'Other, please specify', or 'Additional condition', or 'More reason(s)', etc."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-openLabel|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:choiceColumn">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="choiceColumn"/>
          <short value="Guide for rendering multi-column choices"/>
          <definition
                      value="Provides guidelines for rendering multi-column choices.  I.e. when displaying a list of codes (for `choice` or `open-choice` items) or a list of resources (for `reference` items), this extension allows the drop-down to have multiple columns.  For codes, the author can pick additional code system properties to display - such as alternate display names strength or form for drug codes, etc.  For references, the author can choose particular columns from the resource (e.g. first name, last name, specialty, address)."/>
          <comment value="Each repetition represents a column to display."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-choiceColumn|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:width">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="width"/>
          <short value="Width of column for question"/>
          <definition
                      value="When used with an item control that causes the question to appear as a column in a table, indicates the width to give to the column for this question."/>
          <comment value="code missing = pixels; code = % = percentage."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-width|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:collapsible">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="collapsible"/>
          <short
                 value="Indicates whether the child items of a group or question item is displayed in collapsible form."/>
          <definition
                      value="Indicates whether the child items of a group or question item is displayed in collapsible form."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-collapsible|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:minQuantity">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="minQuantity"/>
          <short value="Must be &gt;= this value"/>
          <definition
                      value="The inclusive lower bound on the range of allowed values for a 'quantity' type question.  Open Issue: Revisit whether this should be folded into the regular minValue extension once there are better capabilities around defining conformance expectations regarding extensions."/>
          <comment
                   value="This  must only be used if the set of permitted units is constrained to UCUM codes and the minimum  checks will be performed by converting the answer.valueQuantity to the same units as the minQuantity unit prior to comparison."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-minQuantity|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:maxQuantity">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="maxQuantity"/>
          <short value="Must be &lt;= this value"/>
          <definition
                      value="The inclusive upper bound on the range of allowed values for  a 'quantity' type question.  Open Issue: Revisit whether this should be folded into the regular maxValue extension once there are better capabilities around defining conformance expectations regarding extensions."/>
          <comment
                   value="This  must only be used if the set of permitted units is constrained to UCUM codes and the maximum checks will be performed by converting the answer.valueQuantity to the same units as the maxQuantity unit prior to comparison."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-maxQuantity|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:lookupQuestionnaire">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="lookupQuestionnaire"/>
          <short value="Questionnaire to populate a reference"/>
          <definition
                      value="For items of type reference, the reference can be populated either by picking an existing entity or by creating a new one.  In the latter case, this Questionnaire allows specifying the Questionnaire to use in creating the target instance.  Typically this will result in a QuestionnaireResponse that can be [extracted](http://hl7.org/fhir/uv/sdc/STU4/extraction.html) to produce the desired resource.  However, if the target resource for the reference is a QuestionnaireResponse, then the QuestionnaireResponse resulting from the Questionnaire can be referenced directly."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-lookupQuestionnaire|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:candidateExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="candidateExpression"/>
          <short value="Expression for possible answers"/>
          <definition
                      value="A FHIRPath or CQL expression, or FHIR Query that resolves to a list of candidate answers for the question item or that establishes context for a group item.  The user may select from among the candidates to choose answers for the question."/>
          <comment
                   value="The results of the expression must correspond to the item type of the question the element appears on or must correspond to a resource, backbone element or complex data type for a group item.  Resources are considered a match for the Reference item type.  Quantity can be a match for decimal and integer items so long as a questionnaire-unit extension is present.  If the expression returns coded data, it **SHALL* return the information as either code or Coding, not CodeableConcept.  If the expression returns elements of type 'code', when the user selects one or more candidates, the code will be matched against the allowed Codings (from answerValueSet, answerOptions, or answerExpresssion).  In this case, it is an error if there is more than one Coding with the same code."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:candidateExpression.id">
          <path value="Questionnaire.item.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:candidateExpression.extension">
          <path value="Questionnaire.item.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:candidateExpression.url">
          <path value="Questionnaire.item.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-candidateExpression"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:candidateExpression.value[x]">
          <path value="Questionnaire.item.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Expression"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].id">
          <path value="Questionnaire.item.extension.value[x].id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].extension">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].extension:alternativeExpression">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <sliceName value="alternativeExpression"/>
          <short value="Alternative Expression"/>
          <definition
                      value="Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression|2.2.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].description">
          <path value="Questionnaire.item.extension.value[x].description"/>
          <short value="Natural language description of the condition"/>
          <definition
                      value="A brief, natural language description of the condition that effectively communicates the intended semantics."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].name">
          <path value="Questionnaire.item.extension.value[x].name"/>
          <short value="Short name assigned to expression for reuse"/>
          <definition
                      value="A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="id"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].language">
          <path value="Questionnaire.item.extension.value[x].language"/>
          <short
                 value="text/cql | text/fhirpath | application/x-fhir-query | etc."/>
          <definition value="The media type of the language for the expression."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Expression.language"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://www.rfc-editor.org/bcp/bcp13.txt"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ExpressionLanguage"/>
            </extension>
            <strength value="extensible"/>
            <description value="The media type of the expression language."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/expression-language|4.0.1"/>
          </binding>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].expression">
          <path value="Questionnaire.item.extension.value[x].expression"/>
          <short value="Expression in specified language"/>
          <definition
                      value="An expression in the specified language that returns a value."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.expression"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:candidateExpression.value[x].reference">
          <path value="Questionnaire.item.extension.value[x].reference"/>
          <short value="Where the expression is found"/>
          <definition value="A URI that defines where the expression is found."/>
          <comment
                   value="If both a reference and an expression is found, the reference SHALL point to the same expression."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.reference"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.item.extension:initialExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="initialExpression"/>
          <short value="Expression-determined initial value"/>
          <definition
                      value="Initial value for a question answer as determined by an evaluated expression."/>
          <comment
                   value="Initial value is only calculated at the time the QuestionnaireResponse is first generated.  If the expression returns coded data, it **SHALL* return the information as either code or Coding, not CodeableConcept.  If the expression returns elements of type 'code', when the user selects one or more candidates, the code will be matched against the allowed Codings (from answerValueSet, answerOptions, or answerExpression).  In this case, it is an error if there is more than one Coding with the same code."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:initialExpression.id">
          <path value="Questionnaire.item.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:initialExpression.extension">
          <path value="Questionnaire.item.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:initialExpression.url">
          <path value="Questionnaire.item.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-initialExpression"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:initialExpression.value[x]">
          <path value="Questionnaire.item.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Expression"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:initialExpression.value[x].id">
          <path value="Questionnaire.item.extension.value[x].id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].extension">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].extension:alternativeExpression">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <sliceName value="alternativeExpression"/>
          <short value="Alternative Expression"/>
          <definition
                      value="Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression|2.2.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].description">
          <path value="Questionnaire.item.extension.value[x].description"/>
          <short value="Natural language description of the condition"/>
          <definition
                      value="A brief, natural language description of the condition that effectively communicates the intended semantics."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].name">
          <path value="Questionnaire.item.extension.value[x].name"/>
          <short value="Short name assigned to expression for reuse"/>
          <definition
                      value="A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="id"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].language">
          <path value="Questionnaire.item.extension.value[x].language"/>
          <short
                 value="text/cql | text/fhirpath | application/x-fhir-query | etc."/>
          <definition value="The media type of the language for the expression."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Expression.language"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://www.rfc-editor.org/bcp/bcp13.txt"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ExpressionLanguage"/>
            </extension>
            <strength value="extensible"/>
            <description value="The media type of the expression language."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/expression-language|4.0.1"/>
          </binding>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].expression">
          <path value="Questionnaire.item.extension.value[x].expression"/>
          <short value="Expression in specified language"/>
          <definition
                      value="An expression in the specified language that returns a value."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.expression"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:initialExpression.value[x].reference">
          <path value="Questionnaire.item.extension.value[x].reference"/>
          <short value="Where the expression is found"/>
          <definition value="A URI that defines where the expression is found."/>
          <comment
                   value="If both a reference and an expression is found, the reference SHALL point to the same expression."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.reference"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.item.extension:calculatedExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="calculatedExpression"/>
          <short value="Expression-determined initial value"/>
          <definition
                      value="Calculated value for a question answer as determined by an evaluated expression."/>
          <comment
                   value="Calculated value is updated  as other answers in the QuestionnaireResponse are filled in."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:calculatedExpression.id">
          <path value="Questionnaire.item.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.extension">
          <path value="Questionnaire.item.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:calculatedExpression.url">
          <path value="Questionnaire.item.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-calculatedExpression"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:calculatedExpression.value[x]">
          <path value="Questionnaire.item.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Expression"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].id">
          <path value="Questionnaire.item.extension.value[x].id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].extension">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].extension:alternativeExpression">
          <path value="Questionnaire.item.extension.value[x].extension"/>
          <sliceName value="alternativeExpression"/>
          <short value="Alternative Expression"/>
          <definition
                      value="Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression|2.2.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].description">
          <path value="Questionnaire.item.extension.value[x].description"/>
          <short value="Natural language description of the condition"/>
          <definition
                      value="A brief, natural language description of the condition that effectively communicates the intended semantics."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].name">
          <path value="Questionnaire.item.extension.value[x].name"/>
          <short value="Short name assigned to expression for reuse"/>
          <definition
                      value="A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="id"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].language">
          <path value="Questionnaire.item.extension.value[x].language"/>
          <short
                 value="text/cql | text/fhirpath | application/x-fhir-query | etc."/>
          <definition value="The media type of the language for the expression."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Expression.language"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://www.rfc-editor.org/bcp/bcp13.txt"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ExpressionLanguage"/>
            </extension>
            <strength value="extensible"/>
            <description value="The media type of the expression language."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/expression-language|4.0.1"/>
          </binding>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].expression">
          <path value="Questionnaire.item.extension.value[x].expression"/>
          <short value="Expression in specified language"/>
          <definition
                      value="An expression in the specified language that returns a value."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.expression"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:calculatedExpression.value[x].reference">
          <path value="Questionnaire.item.extension.value[x].reference"/>
          <short value="Where the expression is found"/>
          <definition value="A URI that defines where the expression is found."/>
          <comment
                   value="If both a reference and an expression is found, the reference SHALL point to the same expression."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.reference"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.item.extension:contextExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="contextExpression"/>
          <short value="Expression for information to guide answers"/>
          <definition
                      value="A FHIR Query that resolves to one or more resources that can be displayed to the user to help provide context for answering a question. For example, if the question is &quot;Has the patient discussed this issue on any visits in the past year?&quot;, the contextExpression might return the set of patient's encounters for the prior 12 month period to help jog the practitioner's memory."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-contextExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:contextExpression.id">
          <path value="Questionnaire.item.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:contextExpression.extension">
          <path value="Questionnaire.item.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="2"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:label">
          <path value="Questionnaire.item.extension.extension"/>
          <sliceName value="label"/>
          <short value="Context label"/>
          <definition
                      value="The text to display in the form filler user interface that explains what the returned context information means"/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:label.id">
          <path value="Questionnaire.item.extension.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:label.extension">
          <path value="Questionnaire.item.extension.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:label.url">
          <path value="Questionnaire.item.extension.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri value="label"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:label.value[x]">
          <path value="Questionnaire.item.extension.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression">
          <path value="Questionnaire.item.extension.extension"/>
          <sliceName value="expression"/>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.id">
          <path value="Questionnaire.item.extension.extension.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.extension">
          <path value="Questionnaire.item.extension.extension.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.url">
          <path value="Questionnaire.item.extension.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri value="expression"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x]">
          <path value="Questionnaire.item.extension.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Expression"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].id">
          <path value="Questionnaire.item.extension.extension.value[x].id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].extension">
          <path
                value="Questionnaire.item.extension.extension.value[x].extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].extension:alternativeExpression">
          <path
                value="Questionnaire.item.extension.extension.value[x].extension"/>
          <sliceName value="alternativeExpression"/>
          <short value="Alternative Expression"/>
          <definition
                      value="Provides an alternate expression containing the compiled JSON ELM for an expression. (NOTE: The expectation is that this extension will transition to the core extensions pack)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/us/davinci-dtr/StructureDefinition/alternativeExpression|2.2.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].description">
          <path
                value="Questionnaire.item.extension.extension.value[x].description"/>
          <short value="Natural language description of the condition"/>
          <definition
                      value="A brief, natural language description of the condition that effectively communicates the intended semantics."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].name">
          <path value="Questionnaire.item.extension.extension.value[x].name"/>
          <short value="Short name assigned to expression for reuse"/>
          <definition
                      value="A short name assigned to the expression to allow for multiple reuse of the expression in the context where it is defined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="id"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].language">
          <path value="Questionnaire.item.extension.extension.value[x].language"/>
          <short
                 value="text/cql | text/fhirpath | application/x-fhir-query | etc."/>
          <definition value="The media type of the language for the expression."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Expression.language"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://www.rfc-editor.org/bcp/bcp13.txt"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ExpressionLanguage"/>
            </extension>
            <strength value="extensible"/>
            <description value="The media type of the expression language."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/expression-language|4.0.1"/>
          </binding>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].expression">
          <path
                value="Questionnaire.item.extension.extension.value[x].expression"/>
          <short value="Expression in specified language"/>
          <definition
                      value="An expression in the specified language that returns a value."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.expression"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element
                 id="Questionnaire.item.extension:contextExpression.extension:expression.value[x].reference">
          <path
                value="Questionnaire.item.extension.extension.value[x].reference"/>
          <short value="Where the expression is found"/>
          <definition value="A URI that defines where the expression is found."/>
          <comment
                   value="If both a reference and an expression is found, the reference SHALL point to the same expression."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Expression.reference"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="Questionnaire.item.extension:contextExpression.url">
          <path value="Questionnaire.item.extension.url"/>
          <representation value="xmlAttr"/>
          <short value="identifies the meaning of the extension"/>
          <definition
                      value="Source of the definition for the extension code - a logical name or a URL."/>
          <comment
                   value="The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Extension.url"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="uri"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <fixedUri
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-contextExpression"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:contextExpression.value[x]">
          <path value="Questionnaire.item.extension.value[x]"/>
          <short value="Value of extension"/>
          <definition
                      value="Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4/extensibility.html) for a list)."/>
          <min value="0"/>
          <max value="0"/>
          <base>
            <path value="Extension.value[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="base64Binary"/>
          </type>
          <type>
            <code value="boolean"/>
          </type>
          <type>
            <code value="canonical"/>
          </type>
          <type>
            <code value="code"/>
          </type>
          <type>
            <code value="date"/>
          </type>
          <type>
            <code value="dateTime"/>
          </type>
          <type>
            <code value="decimal"/>
          </type>
          <type>
            <code value="id"/>
          </type>
          <type>
            <code value="instant"/>
          </type>
          <type>
            <code value="integer"/>
          </type>
          <type>
            <code value="markdown"/>
          </type>
          <type>
            <code value="oid"/>
          </type>
          <type>
            <code value="positiveInt"/>
          </type>
          <type>
            <code value="string"/>
          </type>
          <type>
            <code value="time"/>
          </type>
          <type>
            <code value="unsignedInt"/>
          </type>
          <type>
            <code value="uri"/>
          </type>
          <type>
            <code value="url"/>
          </type>
          <type>
            <code value="uuid"/>
          </type>
          <type>
            <code value="Address"/>
          </type>
          <type>
            <code value="Age"/>
          </type>
          <type>
            <code value="Annotation"/>
          </type>
          <type>
            <code value="Attachment"/>
          </type>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <type>
            <code value="Coding"/>
          </type>
          <type>
            <code value="ContactPoint"/>
          </type>
          <type>
            <code value="Count"/>
          </type>
          <type>
            <code value="Distance"/>
          </type>
          <type>
            <code value="Duration"/>
          </type>
          <type>
            <code value="HumanName"/>
          </type>
          <type>
            <code value="Identifier"/>
          </type>
          <type>
            <code value="Money"/>
          </type>
          <type>
            <code value="Period"/>
          </type>
          <type>
            <code value="Quantity"/>
          </type>
          <type>
            <code value="Range"/>
          </type>
          <type>
            <code value="Ratio"/>
          </type>
          <type>
            <code value="Reference"/>
          </type>
          <type>
            <code value="SampledData"/>
          </type>
          <type>
            <code value="Signature"/>
          </type>
          <type>
            <code value="Timing"/>
          </type>
          <type>
            <code value="ContactDetail"/>
          </type>
          <type>
            <code value="Contributor"/>
          </type>
          <type>
            <code value="DataRequirement"/>
          </type>
          <type>
            <code value="Expression"/>
          </type>
          <type>
            <code value="ParameterDefinition"/>
          </type>
          <type>
            <code value="RelatedArtifact"/>
          </type>
          <type>
            <code value="TriggerDefinition"/>
          </type>
          <type>
            <code value="UsageContext"/>
          </type>
          <type>
            <code value="Dosage"/>
          </type>
          <type>
            <code value="Meta"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.extension:enableWhenExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="enableWhenExpression"/>
          <short value="Expression for when to enable the item"/>
          <definition
                      value="An expression that returns a boolean value for whether to enable the item."/>
          <comment
                   value="This is only permitted when the containing item does NOT have any enableWhen elements.

    If the expression involves comparisons between elements that have different precisions but are otherwise equal, FHIRPath will resolve the expression to an empty set, which will in turn evaluate to false (meaning the item won't be enabled).  If this is not the desired behavior, the author should add a `.allTrue()` to the end of the expression, which will result in an indeterminate outcome because of precision differences being handled as 'true' and the item being enabled.  Questionnaires SHOULD be designed to take into account challenges around varying precision to minimize non-deterministic situations by setting constraints around expected precision, etc.

    If the expression evaluates to something other than a boolean true or false, the Form Filler SHOULD still display the form, and if it does so, SHOULD treat the element as 'enabled' and display a warning to the user that the questionnaire logic was faulty and it's possible that the item shouldn't be enabled."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.extension:answerOptionsToggleExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="answerOptionsToggleExpression"/>
          <short value="Expression constraining allowed answers"/>
          <definition
                      value="A complex expression that provides a list of the allowed options that should be enabled or disabled based on the evaluation of a provided expression.  It allows toggling of allowed answers based on context, including the answers provided to other expressions."/>
          <comment
                   value="For example, this allows a list of conditions to be modified based on the gender of the patient"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerOptionsToggleExpression|4.0.0"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.modifierExtension">
          <path value="Questionnaire.item.modifierExtension"/>
          <short value="Extensions that cannot be ignored even if unrecognized"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <alias value="modifiers"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="BackboneElement.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.linkId">
          <path value="Questionnaire.item.linkId"/>
          <short value="Unique id for item in questionnaire"/>
          <definition
                      value="An identifier that is unique within the Questionnaire allowing linkage to the equivalent item in a QuestionnaireResponse resource."/>
          <comment
                   value="This ''can'' be a meaningful identifier (e.g. a LOINC code) but is not intended to have any meaning.  GUIDs or sequential numbers are appropriate here."/>
          <requirements
                        value="[QuestionnaireResponse](http://hl7.org/fhir/R4/questionnaireresponse.html#) does not require omitted items to be included and may have some items that repeat, so linkage based on position alone is not sufficient."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.linkId"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="que-15"/>
            <severity value="error"/>
            <human value="Link ids must be 255 characters or less"/>
            <expression value="$this.length() &lt;= 255"/>
            <xpath value="string-length(@value) &lt;= 255"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnairecommon"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./section_identifier"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".id"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.definition">
          <path value="Questionnaire.item.definition"/>
          <short value="ElementDefinition - details for the item"/>
          <definition
                      value="This element is a URI that refers to an [ElementDefinition](http://hl7.org/fhir/R4/elementdefinition.html) that provides information about this item, including information that might otherwise be included in the instance of the Questionnaire resource. A detailed description of the construction of the URI is shown in Comments, below. If this element is present then the following element values MAY be derived from the Element Definition if the corresponding elements of this Questionnaire resource instance have no value:

    * code (ElementDefinition.code)
    * type (ElementDefinition.type)
    * required (ElementDefinition.min)
    * repeats (ElementDefinition.max)
    * maxLength (ElementDefinition.maxLength)
    * answerValueSet (ElementDefinition.binding)
    * options (ElementDefinition.binding)."/>
          <comment
                   value="The uri refers to an ElementDefinition in a [StructureDefinition](http://hl7.org/fhir/R4/structuredefinition.html#) and always starts with the [canonical URL](http://hl7.org/fhir/R4/references.html#canonical) for the target resource. When referring to a StructureDefinition, a fragment identifier is used to specify the element definition by its id [Element.id](http://hl7.org/fhir/R4/element-definitions.html#Element.id). E.g. http://hl7.org/fhir/StructureDefinition/Observation#Observation.value[x]. In the absence of a fragment identifier, the first/root element definition in the target is the matching element definition."/>
          <requirements
                        value="A common pattern is to define a set of data elements and then build multiple questionnaires for different circumstances to gather the data. This element provides traceability to the common definition and allows the content for the question to come from the underlying definition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.definition"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=INST].target[classCode=OBS, moodCode=DEF]"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.code">
          <path value="Questionnaire.item.code"/>
          <short value="Corresponding concept for this item in a terminology"/>
          <definition
                      value="A terminology code that corresponds to this group or question (e.g. a code from LOINC, which defines many questions and answers)."/>
          <comment
                   value="The value may come from the ElementDefinition referred to by .definition."/>
          <requirements
                        value="Allows linking of groups of questions to formal terminologies."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item.code"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Coding"/>
          </type>
          <condition value="que-3"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireConcept"/>
            </extension>
            <strength value="example"/>
            <description
                         value="Codes for questionnaires, groups and individual questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-questions|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value=".code"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.prefix">
          <path value="Questionnaire.item.prefix"/>
          <short value="E.g. &quot;1(a)&quot;, &quot;2.5.3&quot;"/>
          <definition
                      value="A short label for a particular group, question or set of display text within the questionnaire used for reference by the individual completing the questionnaire."/>
          <comment
                   value="These are generally unique within a questionnaire, though this is not guaranteed. Some questionnaires may have multiple questions with the same label with logic to control which gets exposed.  Typically, these won't be used for &quot;display&quot; items, though such use is not prohibited.  Systems SHOULD NOT generate their own prefixes if prefixes are defined for any items within a Questionnaire."/>
          <requirements
                        value="Separating the label from the question text allows improved rendering.  Also, instructions will often refer to specific prefixes, so there's a need for the questionnaire design to have control over what labels are used."/>
          <alias value="label"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.prefix"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./section_number/label"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="Not supported"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.prefix.id">
          <path value="Questionnaire.item.prefix.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.prefix.extension">
          <path value="Questionnaire.item.prefix.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.prefix.extension:itemPrefixRenderingStyle">
          <path value="Questionnaire.item.prefix.extension"/>
          <sliceName value="itemPrefixRenderingStyle"/>
          <short value="Html style value"/>
          <definition
                      value="Indicates an HTML style that should be applied when rendering this element."/>
          <comment
                   value="This extension would be equivalent to setting the HTML &quot;style&quot; attribute on the root element for the element containing the extension.

    NOTE: HTML styles can include references to external content (images, fonts, etc.), which may constitute a security issue, as resolving the link can allow tracking.  See [here for more detail](http://hl7.org/fhir/security.html#narrative).

    For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#rendering-style). This style applies to the base string.  If there is also a rendering-xhtml or rendering-markdown extension, they must declare any relevant styles within those extension values.

    Setting styles on elements can be risky.  It presumes knowledge of how elements are rendered &quot;by default&quot;.  For example, setting the color of an element to 'blue' to highlight it might be fine - unless the default background color for a particular renderer is already blue.  As well, it's not a given that all elements will be represented by a single HTML element.  One element might be referenced by a collection of table cells that span rows and columns.  Setting a border style on all of those cells wouldn't give the desired results and auto-tweaking the border style on each cell (deciding whether the border is top,left, right, etc.) would require complex coding.  Finally, systems might not be using HTML for their UI at all and will need to map the specified styles to their own UI mechanism.  For this reason, this element is best used when:
    a) the default UI characteristics are already well understood (because the specification applies to a single system or to a set of systems that are already required to comply with specific UI expectations
    b) the set of allowed style values is tightly controlled to only those that are necessary and sensible in that context"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-style|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.prefix.extension:itemPrefixRenderingXhtml">
          <path value="Questionnaire.item.prefix.extension"/>
          <sliceName value="itemPrefixRenderingXhtml"/>
          <short value="String equivalent with html markup"/>
          <definition
                      value="This is an equivalent of the string on which the extension is sent, but includes additional XHTML markup, such as bold, italics, styles, tables, etc. Existing [restrictions on XHTML content](http://hl7.org/fhir/R4/narrative.html#security) apply. Note that using [markdown](http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-rendering-markdown.html) allows for greater flexibility of display."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#rendering-xhtml)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-xhtml|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="ED can be XHTML content"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.prefix.value">
          <path value="Questionnaire.item.prefix.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for string"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="string.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="[ \r\n\t\S]+"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <maxLength value="1048576"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.text">
          <path value="Questionnaire.item.text"/>
          <short value="Primary text for the item"/>
          <definition
                      value="The name of a section, the text of a question or text content for a display item."/>
          <comment
                   value="When using this element to represent the name of a section, use group type item and also make sure to limit the text element to a short string suitable for display as a section heading.  Group item instructions should be included as a display type item within the group.
    This is optional only to support form assembly situations where the text may be generated from another source.  In an assembled Questionnaire, it should always be present."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.text"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="Form Design/designation[context=&quot;primary?&quot;/definition/  ./section_instruction/label"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".text"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.text.id">
          <path value="Questionnaire.item.text.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.text.extension">
          <path value="Questionnaire.item.text.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.text.extension:itemTextRenderingStyle">
          <path value="Questionnaire.item.text.extension"/>
          <sliceName value="itemTextRenderingStyle"/>
          <short value="Html style value"/>
          <definition
                      value="Indicates an HTML style that should be applied when rendering this element."/>
          <comment
                   value="This extension would be equivalent to setting the HTML &quot;style&quot; attribute on the root element for the element containing the extension.

    NOTE: HTML styles can include references to external content (images, fonts, etc.), which may constitute a security issue, as resolving the link can allow tracking.  See [here for more detail](http://hl7.org/fhir/security.html#narrative).

    For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#rendering-style). This style applies to the base string.  If there is also a rendering-xhtml or rendering-markdown extension, they must declare any relevant styles within those extension values.

    Setting styles on elements can be risky.  It presumes knowledge of how elements are rendered &quot;by default&quot;.  For example, setting the color of an element to 'blue' to highlight it might be fine - unless the default background color for a particular renderer is already blue.  As well, it's not a given that all elements will be represented by a single HTML element.  One element might be referenced by a collection of table cells that span rows and columns.  Setting a border style on all of those cells wouldn't give the desired results and auto-tweaking the border style on each cell (deciding whether the border is top,left, right, etc.) would require complex coding.  Finally, systems might not be using HTML for their UI at all and will need to map the specified styles to their own UI mechanism.  For this reason, this element is best used when:
    a) the default UI characteristics are already well understood (because the specification applies to a single system or to a set of systems that are already required to comply with specific UI expectations
    b) the set of allowed style values is tightly controlled to only those that are necessary and sensible in that context"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-style|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.text.extension:itemTextRenderingXhtml">
          <path value="Questionnaire.item.text.extension"/>
          <sliceName value="itemTextRenderingXhtml"/>
          <short value="String equivalent with html markup"/>
          <definition
                      value="This is an equivalent of the string on which the extension is sent, but includes additional XHTML markup, such as bold, italics, styles, tables, etc. Existing [restrictions on XHTML content](http://hl7.org/fhir/R4/narrative.html#security) apply. Note that using [markdown](http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-rendering-markdown.html) allows for greater flexibility of display."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#rendering-xhtml)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-xhtml|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="ED can be XHTML content"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.text.extension:itemTextCqfExpression">
          <path value="Questionnaire.item.text.extension"/>
          <sliceName value="itemTextCqfExpression"/>
          <short value="An dynamic expression"/>
          <definition
                      value="An expression that, when evaluated, provides the value for the element on which it appears."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-expression)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.text.value">
          <path value="Questionnaire.item.text.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for string"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="string.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="[ \r\n\t\S]+"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <maxLength value="1048576"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.type">
          <path value="Questionnaire.item.type"/>
          <short
                 value="group | display | boolean | decimal | integer | date | dateTime +"/>
          <definition
                      value="The type of questionnaire item this is - whether text for display, a grouping of other items or a particular type of data to be captured (string, integer, coded choice, etc.)."/>
          <comment
                   value="Time is handled using &quot;string&quot;.  File is handled using Attachment.  (Content can be sent as a contained binary)."/>
          <requirements
                        value="Defines the format in which the user is to be prompted for the answer."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.type"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireItemType"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Distinguishes groups from questions and display text and indicates data type for questions."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/item-type|4.0.1"/>
          </binding>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./*/datatype"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen">
          <path value="Questionnaire.item.enableWhen"/>
          <short value="Only allow data when"/>
          <definition
                      value="A constraint indicating that this item should only be enabled (displayed/allow answers to be captured) when the specified condition is true."/>
          <comment
                   value="If multiple repetitions of this extension are present, the item should be enabled when the condition for *any* of the repetitions is true.  I.e. treat &quot;enableWhen&quot;s as being joined by an &quot;or&quot; clause.  This element is a modifier because if enableWhen is present for an item, &quot;required&quot; is ignored unless one of the enableWhen conditions is met. When an item is disabled, all of its descendants are disabled, regardless of what their own enableWhen logic might evaluate to."/>
          <requirements
                        value="Allows questionnaires to adapt based on answers to other questions. E.g. If physical gender is specified as a male, no need to capture pregnancy history.  Also allows conditional display of instructions or groups of questions."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item.enableWhen"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="que-7"/>
            <severity value="error"/>
            <human
                   value="If the operator is 'exists', the value must be a boolean"/>
            <expression value="operator = 'exists' implies (answer is Boolean)"/>
            <xpath
                   value="f:operator/@value != 'exists' or exists(f:answerBoolean)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/Questionnaire"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="true"/>
          <isModifierReason
                            value="If enableWhen is present and the condition evaluates to false, then the Questionnaire behaves as though the elements weren't actually present"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.id">
          <path value="Questionnaire.item.enableWhen.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.extension">
          <path value="Questionnaire.item.enableWhen.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.modifierExtension">
          <path value="Questionnaire.item.enableWhen.modifierExtension"/>
          <short value="Extensions that cannot be ignored even if unrecognized"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <alias value="modifiers"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="BackboneElement.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.question">
          <path value="Questionnaire.item.enableWhen.question"/>
          <short value="Question that determines whether item is enabled"/>
          <definition
                      value="The linkId for the question whose answer (or lack of answer) governs whether this item is enabled."/>
          <comment
                   value="If multiple question occurrences are present for the same question (same linkId), then this refers to the nearest question occurrence reachable by tracing first the &quot;ancestor&quot; axis and then the &quot;preceding&quot; axis and then the &quot;following&quot; axis."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.enableWhen.question"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.operator">
          <path value="Questionnaire.item.enableWhen.operator"/>
          <short value="exists | = | != | &gt; | &lt; | &gt;= | &lt;="/>
          <definition
                      value="Specifies the criteria by which the question is enabled."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.enableWhen.operator"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireItemOperator"/>
            </extension>
            <strength value="required"/>
            <description value="The criteria by which a question is enabled."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-enable-operator|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableWhen.answer[x]">
          <path value="Questionnaire.item.enableWhen.answer[x]"/>
          <short value="Value for question comparison based on operator"/>
          <definition
                      value="A value that the referenced question is tested using the specified operator in order for the item to be enabled."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.enableWhen.answer[x]"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <type>
            <code value="decimal"/>
          </type>
          <type>
            <code value="integer"/>
          </type>
          <type>
            <code value="date"/>
          </type>
          <type>
            <code value="dateTime"/>
          </type>
          <type>
            <code value="time"/>
          </type>
          <type>
            <code value="string"/>
          </type>
          <type>
            <code value="Coding"/>
          </type>
          <type>
            <code value="Quantity"/>
          </type>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Resource|4.0.1"/>
          </type>
          <condition value="que-7"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireQuestionOption3"/>
            </extension>
            <strength value="example"/>
            <description value="Allowed values to answer questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-answers|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.enableBehavior">
          <path value="Questionnaire.item.enableBehavior"/>
          <short value="all | any"/>
          <definition
                      value="Controls how multiple enableWhen values are interpreted -  whether all or any must be true."/>
          <comment
                   value="This element must be specified if more than one enableWhen value is provided."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.enableBehavior"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <condition value="que-12"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="EnableWhenBehavior"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Controls how multiple enableWhen values are interpreted -  whether all or any must be true."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-enable-behavior|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.required">
          <path value="Questionnaire.item.required"/>
          <short value="Whether the item must be included in data results"/>
          <definition
                      value="An indication, if true, that the item must be present in a &quot;completed&quot; QuestionnaireResponse.  If false, the item may be skipped when answering the questionnaire."/>
          <comment
                   value="Questionnaire.item.required only has meaning for elements that are conditionally enabled with enableWhen if the condition evaluates to true.  If an item that contains other items is marked as required, that does not automatically make the contained elements required (though required groups must contain at least one child element). The value may come from the ElementDefinition referred to by .definition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.required"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <meaningWhenMissing
                              value="Items are generally assumed not to be required unless explicitly specified. Systems SHOULD always populate this value"/>
          <condition value="que-6"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./cardinality/minimum!=0"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.required.id">
          <path value="Questionnaire.item.required.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.required.extension">
          <path value="Questionnaire.item.required.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.required.value">
          <path value="Questionnaire.item.required.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.required.value.id">
          <path value="Questionnaire.item.required.value.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.required.value.extension">
          <path value="Questionnaire.item.required.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.required.value.extension:requiredExpression">
          <path value="Questionnaire.item.required.value.extension"/>
          <sliceName value="requiredExpression"/>
          <short value="An dynamic expression"/>
          <definition
                      value="An expression that, when evaluated, provides the value for the element on which it appears."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-expression)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.required.value.value">
          <path value="Questionnaire.item.required.value.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats">
          <path value="Questionnaire.item.repeats"/>
          <short value="Whether the item may repeat"/>
          <definition
                      value="An indication, if true, that a QuestionnaireResponse for this item may include multiple answers associated with a single instance of this item (for question-type items) or multiple repetitions of the item (for group-type items)"/>
          <comment
                   value="If a question is marked as repeats=true, then multiple answers can be provided for the question in the corresponding QuestionnaireResponse.  When rendering the questionnaire, it is up to the rendering software whether to render the question text for each answer repetition (i.e. &quot;repeat the question&quot;) or to simply allow entry/selection of multiple answers for the question (repeat the answers).  Which is most appropriate visually may depend on the type of answer as well as whether there are nested items.

    The resulting QuestionnaireResponse will be populated the same way regardless of rendering - one 'question' item with multiple answer values.

     The value may come from the ElementDefinition referred to by .definition."/>
          <requirements
                        value="Items may be used to create set of (related) questions that can be repeated to give multiple answers to such a set."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.repeats"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <meaningWhenMissing
                              value="Items are generally assumed not to repeat unless explicitly specified. Systems SHOULD always populate this value"/>
          <condition value="que-6"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./cardinality/maximum!=1"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.repeats.id">
          <path value="Questionnaire.item.repeats.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.extension">
          <path value="Questionnaire.item.repeats.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.value">
          <path value="Questionnaire.item.repeats.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.value.id">
          <path value="Questionnaire.item.repeats.value.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.value.extension">
          <path value="Questionnaire.item.repeats.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.repeats.value.extension:repeatsExpression">
          <path value="Questionnaire.item.repeats.value.extension"/>
          <sliceName value="repeatsExpression"/>
          <short value="An dynamic expression"/>
          <definition
                      value="An expression that, when evaluated, provides the value for the element on which it appears."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-expression)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.value.value">
          <path value="Questionnaire.item.repeats.value.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly">
          <path value="Questionnaire.item.readOnly"/>
          <short value="Don't allow human editing"/>
          <definition
                      value="An indication, when true, that the value cannot be changed by a human respondent to the Questionnaire."/>
          <comment
                   value="The value of readOnly elements can be established by asserting  extensions for defaultValues, linkages that support pre-population and/or extensions that support calculation based on other answers."/>
          <requirements
                        value="Allows certain information to be phrased (and rendered) as a question and an answer, while keeping users from changing it.  May also be useful for preventing changes to pre-populated portions of a questionnaire, for calculated values, etc."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.readOnly"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <condition value="que-9"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="./*_Field/default_value_read_only  ./default_element/read_only"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.readOnly.id">
          <path value="Questionnaire.item.readOnly.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.extension">
          <path value="Questionnaire.item.readOnly.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.value">
          <path value="Questionnaire.item.readOnly.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.value.id">
          <path value="Questionnaire.item.readOnly.value.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.value.extension">
          <path value="Questionnaire.item.readOnly.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.readOnly.value.extension:readOnlyExpression">
          <path value="Questionnaire.item.readOnly.value.extension"/>
          <sliceName value="readOnlyExpression"/>
          <short value="An dynamic expression"/>
          <definition
                      value="An expression that, when evaluated, provides the value for the element on which it appears."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-expression)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.value.value">
          <path value="Questionnaire.item.readOnly.value.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for boolean"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="boolean.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="boolean"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="true|false"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.Boolean"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.maxLength">
          <path value="Questionnaire.item.maxLength"/>
          <short value="No more than this many characters"/>
          <definition
                      value="The maximum number of characters that are permitted in the answer to be considered a &quot;valid&quot; QuestionnaireResponse."/>
          <comment
                   value="For base64binary, reflects the number of characters representing the encoded data, not the number of bytes of the binary data. The value may come from the ElementDefinition referred to by .definition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.maxLength"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="integer"/>
          </type>
          <condition value="que-10"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="./*_Field/maximum_character_quantity | ./*_Field/datatype/string/maximum_characters"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="N/A"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerValueSet">
          <path value="Questionnaire.item.answerValueSet"/>
          <short value="Valueset containing permitted answers"/>
          <definition
                      value="A reference to a value set containing a list of codes representing permitted answers for a &quot;choice&quot; or &quot;open-choice&quot; question."/>
          <comment
                   value="LOINC defines many useful value sets for questionnaire responses. See [LOINC Answer Lists](http://hl7.org/fhir/R4/loinc.html#alist). The value may come from the ElementDefinition referred to by .definition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.answerValueSet"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-valueset|4.0.0"/>
          </type>
          <condition value="que-4"/>
          <condition value="que-5"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./list_field | ./lookup_field/endpoint"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerValueSet.id">
          <path value="Questionnaire.item.answerValueSet.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.extension">
          <path value="Questionnaire.item.answerValueSet.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.value">
          <path value="Questionnaire.item.answerValueSet.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for canonical"/>
          <definition value="Primitive value for canonical"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="uri.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="\S*"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.value.id">
          <path value="Questionnaire.item.answerValueSet.value.id"/>
          <representation value="xmlAttr"/>
          <short value="xml:id (or equivalent in JSON)"/>
          <definition
                      value="unique id for the element within a resource (for internal references)"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.value.extension">
          <path value="Questionnaire.item.answerValueSet.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element
                 id="Questionnaire.item.answerValueSet.value.extension:answerValueSetExpression">
          <path value="Questionnaire.item.answerValueSet.value.extension"/>
          <sliceName value="answerValueSetExpression"/>
          <short value="An dynamic expression"/>
          <definition
                      value="An expression that, when evaluated, provides the value for the element on which it appears."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#cqf-expression)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.value.value">
          <path value="Questionnaire.item.answerValueSet.value.value"/>
          <representation value="xmlAttr"/>
          <short value="Primitive value for string"/>
          <definition value="The actual value"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="string.value"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <extension url="http://hl7.org/fhir/StructureDefinition/regex">
              <valueString value="[ \r\n\t\S]+"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <maxLength value="1048576"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerOption">
          <path value="Questionnaire.item.answerOption"/>
          <short value="Permitted answer"/>
          <definition
                      value="One of the permitted answers for a &quot;choice&quot; or &quot;open-choice&quot; question."/>
          <comment
                   value="This element can be used when the value set machinery of answerValueSet is deemed too cumbersome or when there's a need to capture possible answers that are not codes."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item.answerOption"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="que-4"/>
          <condition value="que-5"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.id">
          <path value="Questionnaire.item.answerOption.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.extension">
          <path value="Questionnaire.item.answerOption.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerOption.extension:optionExclusive">
          <path value="Questionnaire.item.answerOption.extension"/>
          <sliceName value="optionExclusive"/>
          <short value="Option is exclusive"/>
          <definition
                      value="If true, indicates that if this answerOption is selected, no other possible answers may be selected, even if the item is a repeating question."/>
          <comment
                   value="See additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/behavior.html#optionExclusive)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/questionnaire-optionExclusive|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerOption.extension:ordinalValue">
          <path value="Questionnaire.item.answerOption.extension"/>
          <sliceName value="ordinalValue"/>
          <short value="Assigned Ordinal Value"/>
          <definition
                      value="A numeric value that allows the comparison (less than, greater than) or other numerical
    manipulation of a concept (e.g. Adding up components of a score). Scores are usually a whole number, but occasionally decimals are encountered in scores."/>
          <comment
                   value="Scores are commonly encountered in various clinical assessment scales. Assigning a value to a concept should generally be done in a formal code system that defines the value, or in an applicable value set for the concept, but some concepts do not have a formal definition (or are not even represented as a concept formally, especially in [Questionnaires](questionnaire.html),
    so this extension is allowed to appear ouside those preferred contexts.  Scores may even be assigned arbitrarily during use (hence, on Coding). The value may be constrained to an integer in some contexts of use. Todo: Scoring algorithms may also be defined directly, but how this is done is not yet defined."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/ordinalValue|5.3.0-ballot-tc1"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerOption.extension:itemAnswerMedia">
          <path value="Questionnaire.item.answerOption.extension"/>
          <sliceName value="itemAnswerMedia"/>
          <short value="Answer Media to display"/>
          <definition
                      value="Media to render/make available as an accompaniment to a specific answer option"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-itemAnswerMedia|4.0.0"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="Questionnaire.item.answerOption.modifierExtension">
          <path value="Questionnaire.item.answerOption.modifierExtension"/>
          <short value="Extensions that cannot be ignored even if unrecognized"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <alias value="modifiers"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="BackboneElement.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.value[x]">
          <path value="Questionnaire.item.answerOption.value[x]"/>
          <slicing>
            <discriminator>
              <type value="type"/>
              <path value="$this"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="closed"/>
          </slicing>
          <short value="Answer value"/>
          <definition
                      value="A potential answer that's allowed as the answer to this question."/>
          <comment
                   value="The data type of the value must agree with the item.type."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.answerOption.value[x]"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="integer"/>
          </type>
          <type>
            <code value="date"/>
          </type>
          <type>
            <code value="time"/>
          </type>
          <type>
            <code value="string"/>
          </type>
          <type>
            <code value="Coding"/>
          </type>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Resource|4.0.1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireQuestionOption"/>
            </extension>
            <strength value="example"/>
            <description value="Allowed values to answer questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-answers|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.value[x].id">
          <path value="Questionnaire.item.answerOption.value[x].id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.value[x].extension">
          <path value="Questionnaire.item.answerOption.value[x].extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <description value="Extensions are always sliced by (at least) url"/>
            <rules value="open"/>
          </slicing>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element
                 id="Questionnaire.item.answerOption.value[x].extension:answerOptionRenderingXhtml">
          <path value="Questionnaire.item.answerOption.value[x].extension"/>
          <sliceName value="answerOptionRenderingXhtml"/>
          <short value="String equivalent with html markup"/>
          <definition
                      value="This is an equivalent of the string on which the extension is sent, but includes additional XHTML markup, such as bold, italics, styles, tables, etc. Existing [restrictions on XHTML content](http://hl7.org/fhir/R4/narrative.html#security) apply. Note that using [markdown](http://hl7.org/fhir/extensions/5.3.0-ballot-tc1/StructureDefinition-rendering-markdown.html) allows for greater flexibility of display."/>
          <comment
                   value="For questionnaires, see additional guidance and examples in the [SDC implementation guide](http://hl7.org/fhir/uv/sdc/2025Jan/rendering.html#rendering-xhtml)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/rendering-xhtml|5.3.0-ballot-tc1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="ED can be XHTML content"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.value[x]:valueCoding">
          <path value="Questionnaire.item.answerOption.value[x]"/>
          <sliceName value="valueCoding"/>
          <short value="Answer value"/>
          <definition
                      value="A potential answer that's allowed as the answer to this question."/>
          <comment
                   value="The data type of the value must agree with the item.type."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.answerOption.value[x]"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Coding"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="sdc-base-1"/>
            <severity value="error"/>
            <human
                   value="AnswerOption.valueCoding must have at least one of code or display"/>
            <expression value="code.exists() or display.exists()"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire|4.0.0"/>
          </constraint>
          <constraint>
            <key value="sdc-base-2"/>
            <severity value="error"/>
            <human value="If code exists, system must exist"/>
            <expression value="code.exists() implies system.exists()"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire|4.0.0"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireQuestionOption"/>
            </extension>
            <strength value="example"/>
            <description value="Allowed values to answer questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-answers|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.value[x]:valueReference">
          <path value="Questionnaire.item.answerOption.value[x]"/>
          <sliceName value="valueReference"/>
          <short value="Answer value"/>
          <definition
                      value="A potential answer that's allowed as the answer to this question."/>
          <comment
                   value="The data type of the value must agree with the item.type."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.answerOption.value[x]"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Resource"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="sdc-base-4"/>
            <severity value="error"/>
            <human
                   value="Reference must have at least one of reference, display, and identifier"/>
            <expression
                        value="reference.exists() or display.exists() or identifier.exists()"/>
            <source
                    value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire|4.0.0"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.answerOption.initialSelected">
          <path value="Questionnaire.item.answerOption.initialSelected"/>
          <short value="Whether option is selected by default"/>
          <definition
                      value="Indicates whether the answer value is selected when the list of possible answers is initially shown."/>
          <comment
                   value="Use this instead of initial[v] if answerValueSet is present."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.answerOption.initialSelected"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <meaningWhenMissing
                              value="Only selected items explicitly marked to be selected"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.initial">
          <path value="Questionnaire.item.initial"/>
          <short value="Initial value(s) when item is first rendered"/>
          <definition
                      value="One or more values that should be pre-populated in the answer when initially rendering the questionnaire for user input."/>
          <comment
                   value="The user is allowed to change the value and override the default (unless marked as read-only). If the user doesn't change the value, then this initial value will be persisted when the QuestionnaireResponse is initially created.  Note that initial values can influence results.  The data type of initial[x] must agree with the item.type, and only repeating items can have more then one initial value."/>
          <requirements value="In some workflows, having defaults saves time."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item.initial"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <condition value="que-8"/>
          <condition value="que-13"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.initial.id">
          <path value="Questionnaire.item.initial.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.initial.extension">
          <path value="Questionnaire.item.initial.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.initial.modifierExtension">
          <path value="Questionnaire.item.initial.modifierExtension"/>
          <short value="Extensions that cannot be ignored even if unrecognized"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <alias value="modifiers"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="BackboneElement.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.initial.value[x]">
          <path value="Questionnaire.item.initial.value[x]"/>
          <short value="Actual value for initializing the question"/>
          <definition value="The actual value to for an initial answer."/>
          <comment
                   value="The type of the initial value must be consistent with the type of the item."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="Questionnaire.item.initial.value[x]"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <type>
            <code value="decimal"/>
          </type>
          <type>
            <code value="integer"/>
          </type>
          <type>
            <code value="date"/>
          </type>
          <type>
            <code value="dateTime"/>
          </type>
          <type>
            <code value="time"/>
          </type>
          <type>
            <code value="string"/>
          </type>
          <type>
            <code value="uri"/>
          </type>
          <type>
            <code value="Attachment"/>
          </type>
          <type>
            <code value="Coding"/>
          </type>
          <type>
            <code value="Quantity"/>
          </type>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Resource|4.0.1"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="QuestionnaireQuestionOption2"/>
            </extension>
            <strength value="example"/>
            <description value="Allowed values to answer questions."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/questionnaire-answers|4.0.1"/>
          </binding>
          <mapping>
            <identity value="ihe-sdc"/>
            <map
                 value="./default_value  ./default_element/default/value  ./default_element/list_item_identifier (resolve)"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="N/A - MIF rather than RIM level"/>
          </mapping>
        </element>
        <element id="Questionnaire.item.item">
          <path value="Questionnaire.item.item"/>
          <short value="Nested questionnaire items"/>
          <definition
                      value="Text, questions and other groups to be nested beneath a question or group."/>
          <comment
                   value="There is no specified limit to the depth of nesting.  However, Questionnaire authors are encouraged to consider the impact on the user and user interface of overly deep nesting."/>
          <requirements value="Reports can consist of complex nested groups."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Questionnaire.item.item"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <contentReference
                            value="http://hl7.org/fhir/StructureDefinition/Questionnaire#Questionnaire.item"/>
          <condition value="que-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="ihe-sdc"/>
            <map value="./contained_section"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".outboundRelationship[typeCode=COMP].target"/>
          </mapping>
        </element>
      </snapshot>
      <differential>
        <element id="Questionnaire">
          <path value="Questionnaire"/>
        </element>
        <element id="Questionnaire.item">
          <path value="Questionnaire.item"/>
          <min value="1"/>
        </element>
        <element id="Questionnaire.item.extension:enableWhenExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="enableWhenExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-enableWhenExpression|4.0.0"/>
          </type>
          <mustSupport value="true"/>
        </element>
        <element id="Questionnaire.item.extension:answerOptionsToggleExpression">
          <path value="Questionnaire.item.extension"/>
          <sliceName value="answerOptionsToggleExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/uv/sdc/StructureDefinition/sdc-questionnaire-answerOptionsToggleExpression|4.0.0"/>
          </type>
        </element>
        <element id="Questionnaire.item.text.extension:itemTextCqfExpression">
          <path value="Questionnaire.item.text.extension"/>
          <sliceName value="itemTextCqfExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
        </element>
        <element id="Questionnaire.item.enableWhen">
          <path value="Questionnaire.item.enableWhen"/>
          <mustSupport value="true"/>
        </element>
        <element id="Questionnaire.item.required.value">
          <path value="Questionnaire.item.required.value"/>
          <mustSupport value="false"/>
        </element>
        <element id="Questionnaire.item.required.value.extension">
          <path value="Questionnaire.item.required.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
        </element>
        <element
                 id="Questionnaire.item.required.value.extension:requiredExpression">
          <path value="Questionnaire.item.required.value.extension"/>
          <sliceName value="requiredExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
        </element>
        <element id="Questionnaire.item.repeats.value">
          <path value="Questionnaire.item.repeats.value"/>
          <mustSupport value="false"/>
        </element>
        <element id="Questionnaire.item.repeats.value.extension">
          <path value="Questionnaire.item.repeats.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
        </element>
        <element
                 id="Questionnaire.item.repeats.value.extension:repeatsExpression">
          <path value="Questionnaire.item.repeats.value.extension"/>
          <sliceName value="repeatsExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
        </element>
        <element id="Questionnaire.item.readOnly.value">
          <path value="Questionnaire.item.readOnly.value"/>
          <mustSupport value="false"/>
        </element>
        <element id="Questionnaire.item.readOnly.value.extension">
          <path value="Questionnaire.item.readOnly.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
        </element>
        <element
                 id="Questionnaire.item.readOnly.value.extension:readOnlyExpression">
          <path value="Questionnaire.item.readOnly.value.extension"/>
          <sliceName value="readOnlyExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
        </element>
        <element id="Questionnaire.item.answerValueSet.value">
          <path value="Questionnaire.item.answerValueSet.value"/>
          <mustSupport value="false"/>
        </element>
        <element id="Questionnaire.item.answerValueSet.value.extension">
          <path value="Questionnaire.item.answerValueSet.value.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
        </element>
        <element
                 id="Questionnaire.item.answerValueSet.value.extension:answerValueSetExpression">
          <path value="Questionnaire.item.answerValueSet.value.extension"/>
          <sliceName value="answerValueSetExpression"/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/cqf-expression|5.3.0-ballot-tc1"/>
          </type>
        </element>
      </differential>
    </StructureDefinition>