Order Catalog Implementation Guide
1.0.0 - STU 1

Order Catalog Implementation Guide, published by HL7 International / Orders and Observations. This guide is not an authorized publication; it is the continuous build for version 1.0.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/HL7/fhir-order-catalog/ and changes regularly. See the Directory of published versions

## Resource Profile: LabObservationDefinition - XML Profile

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

XML representation of the LabObservationDefinition resource profile.

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    <StructureDefinition xmlns="http://hl7.org/fhir">
      <id value="LabObservationDefinition"/>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition LabObservationDefinition</b></p><a name="LabObservationDefinition"> </a><a name="hcLabObservationDefinition"> </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-LabObservationDefinition-definitions.html#ObservationDefinition">ObservationDefinition</a><a name="ObservationDefinition"> </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="http://hl7.org/fhir/R5/observationdefinition.html">ObservationDefinition</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">Definition of an observation</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_bck11.png)" class="hierarchy"><img src="tbl_spacer.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-LabObservationDefinition-definitions.html#ObservationDefinition.code">code</a><a name="ObservationDefinition.code"> </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_bck103.png)" class="hierarchy"><img src="tbl_spacer.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"/> <a style="font-style: italic; font-style: italic" href="StructureDefinition-LabObservationDefinition-definitions.html#ObservationDefinition.code.coding">Slices for coding</a><a name="ObservationDefinition.code.coding"> </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="font-style: italic"/><span style="opacity: 0.5; font-style: italic">0</span><span style="opacity: 0.5; font-style: italic">..</span><span style="opacity: 0.5; font-style: italic">*</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; font-style: italic; opacity: 0.5; font-style: italic" href="http://hl7.org/fhir/R5/datatypes.html#Coding">Coding</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; font-style: italic">Code defined by a terminology system</span><br style="font-style: italic"/><span style="font-weight:bold; font-style: italic">Slice: </span><span style="font-style: italic">Unordered, Open by value:system</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_bck1025.png)" class="hierarchy"><img src="tbl_spacer.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-LabObservationDefinition-definitions.html#ObservationDefinition.code.coding:LOINC" title="Slice LOINC">coding:LOINC</a><a name="ObservationDefinition.code.coding.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"><span style="opacity: 0.5">0</span>..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 style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R5/datatypes.html#Coding">Coding</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">Code defined by a terminology system</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_bck10240.png)" class="hierarchy"><img src="tbl_spacer.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_slice.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-LabObservationDefinition-definitions.html#ObservationDefinition.code.coding:LOINC.system">system</a><a name="ObservationDefinition.code.coding.system"> </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/R5/datatypes.html#uri">uri</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">Identity of the terminology system</span><br/><span style="font-weight:bold">Required Pattern: </span><span style="color: darkgreen">http://loinc.org</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_bck10.png)" class="hierarchy"><img src="tbl_spacer.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-LabObservationDefinition-definitions.html#ObservationDefinition.permittedDataType">permittedDataType</a><a name="ObservationDefinition.permittedDataType"> </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: #D50000" 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"><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/R5/datatypes.html#code">code</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">Quantity | CodeableConcept | string | boolean | integer | Range | Ratio | SampledData | time | dateTime | Period</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_bck10.png)" class="hierarchy"><img src="tbl_spacer.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-LabObservationDefinition-definitions.html#ObservationDefinition.multipleResultsAllowed">multipleResultsAllowed</a><a name="ObservationDefinition.multipleResultsAllowed"> </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: #D50000" 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">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/R5/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">Multiple results allowed for conforming observations</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-LabObservationDefinition-definitions.html#ObservationDefinition.permittedUnit">permittedUnit</a><a name="ObservationDefinition.permittedUnit"> </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: #D50000" 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"><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/R5/datatypes.html#Coding">Coding</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">Unit for quantitative results</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_bck000.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: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-LabObservationDefinition-definitions.html#ObservationDefinition.permittedUnit.system">system</a><a name="ObservationDefinition.permittedUnit.system"> </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/R5/datatypes.html#uri">uri</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">Identity of the terminology system</span><br/><span style="font-weight:bold">Required Pattern: </span><span style="color: darkgreen">http://unitsofmeasure.org</span></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="oo"/>
      </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/uv/order-catalog/ImplementationGuide/ig-uv-order-catalog"/>
          </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/uv/order-catalog/ImplementationGuide/ig-uv-order-catalog"/>
          </extension>
        </valueCode>
      </extension>
      <url
           value="http://hl7.org/fhir/uv/order-catalog/StructureDefinition/LabObservationDefinition"/>
      <identifier>
        <system value="urn:ietf:rfc:3986"/>
        <value value="urn:oid:2.16.840.1.113883.4.642.40.55.42.16"/>
      </identifier>
      <version value="1.0.0"/>
      <name value="LabObservationDefinition"/>
      <title value="Laboratory Observation Definition"/>
      <status value="active"/>
      <date value="2026-06-03T16:34:09+00:00"/>
      <publisher value="HL7 International / Orders and Observations"/>
      <contact>
        <telecom>
          <system value="url"/>
          <value value="http://www.hl7.org/Special/committees/orders"/>
        </telecom>
      </contact>
      <description
                   value="This profile constrains the base resource ObservationDefinition when referenced by ActivityDefinition.observationResultRequirement in the context of a catalog of laboratory services. Such a resource specifies the form of an output observation produced by a laboratory service."/>
      <jurisdiction>
        <coding>
          <system value="http://unstats.un.org/unsd/methods/m49/m49.htm"/>
          <code value="001"/>
        </coding>
      </jurisdiction>
      <fhirVersion value="5.0.0"/>
      <mapping>
        <identity value="v2"/>
        <uri value="http://hl7.org/v2"/>
        <name value="HL7 v2 Mapping"/>
      </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="workflow"/>
        <uri value="http://hl7.org/fhir/workflow"/>
        <name value="Workflow Pattern"/>
      </mapping>
      <kind value="resource"/>
      <abstract value="false"/>
      <type value="ObservationDefinition"/>
      <baseDefinition
                      value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition"/>
      <derivation value="constraint"/>
      <snapshot>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
          <valueString value="5.0.0"/>
        </extension>
        <element id="ObservationDefinition">
          <path value="ObservationDefinition"/>
          <short value="Definition of an observation"/>
          <definition
                      value="Set of definitional characteristics for a kind of observation or measurement produced or consumed by an orderable health care service."/>
          <comment
                   value="An instance of this resource informs the consumer of a health-related service (such as a lab diagnostic test or panel) about how the observations used or produced by this service will look like."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <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}$')"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition"/>
          </constraint>
          <constraint>
            <key value="obd-0"/>
            <severity value="error"/>
            <human
                   value="If permittedUnit exists, then permittedDataType=Quantity must exist."/>
            <expression
                        value="permittedUnit.exists() implies (permittedDataType = 'Quantity').exists()"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="w5"/>
            <map value="conformance.behavior,clinical.diagnostics"/>
          </mapping>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="OM2
    OM3
    OMC"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="Observation[classCode=OBS, moodCode=DEF]"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.id">
          <path value="ObservationDefinition.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="Within the context of the FHIR RESTful interactions, the resource has an id except for cases like the create and conditional update. Otherwise, the use of the resouce id depends on the given use case."/>
          <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>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.meta">
          <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.implicitRules">
          <path value="ObservationDefinition.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 its 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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <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 its meaning or interpretation"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.language">
          <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="Language"/>
            </extension>
            <strength value="required"/>
            <description value="IETF language tag for a human language"/>
            <valueSet value="http://hl7.org/fhir/ValueSet/all-languages|5.0.0"/>
            <additional>
              <purpose value="starter"/>
              <valueSet value="http://hl7.org/fhir/ValueSet/languages|5.0.0"/>
            </additional>
          </binding>
        </element>
        <element id="ObservationDefinition.text">
          <path value="ObservationDefinition.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 a 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>
          <condition value="dom-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="Act.text?"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.contained">
          <path value="ObservationDefinition.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, nor can they have their own independent transaction scope. This is allowed to be a Parameters resource if and only if it is referenced by a resource that provides context/meaning."/>
          <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>
          <condition value="dom-2"/>
          <condition value="dom-4"/>
          <condition value="dom-3"/>
          <condition value="dom-5"/>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.extension">
          <path value="ObservationDefinition.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 managable, 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="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())"/>
            <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()"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.modifierExtension">
          <path value="ObservationDefinition.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 managable, 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/R5/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())"/>
            <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()"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.url">
          <path value="ObservationDefinition.url"/>
          <short
                 value="Logical canonical URL to reference this ObservationDefinition (globally unique)"/>
          <definition
                      value="An absolute URL that is used to identify this ObservationDefinition when it is referenced in a specification, model, design or an instance. This SHALL be a URL, SHOULD be globally unique, and SHOULD be an address at which this ObservationDefinition is (or will be) published. The URL SHOULD include the major version of the ObservationDefinition. For more information see Technical and Business Versions."/>
          <comment
                   value="Can be a urn:uuid: or a urn:oid:, but real http: addresses are preferred. This is the URI that will be used when making canonical references to this resource."/>
          <requirements
                        value="Allows the ObservationDefinition to be referenced by a single globally unique identifier."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.url"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.identifier">
          <path value="ObservationDefinition.identifier"/>
          <short value="Business identifier of the ObservationDefinition"/>
          <definition
                      value="Business identifiers assigned to this ObservationDefinition. by the performer and/or other systems. These identifiers remain constant as the resource is updated and propagates from server to server."/>
          <comment
                   value="This is a business identifier, not a resource identifier. It is best practice for the identifier to only appear on a single resource instance, however business practices may occasionally dictate that multiple resource instances with the same identifier can exist - possibly even with different resource types."/>
          <requirements
                        value="Allows identification of the ObservationDefinition as it is known by various participating systems and in a way that remains consistent across servers."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.identifier"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.identifier"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.version">
          <path value="ObservationDefinition.version"/>
          <short value="Business version of the ObservationDefinition"/>
          <definition
                      value="The identifier that is used to identify this version of the ObservationDefinition when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the ObservationDefinition 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 are orderable."/>
          <comment
                   value="There may be multiple different instances of an observationDefinition that have the same identifier but different versions."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.version"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.versionAlgorithm[x]">
          <path value="ObservationDefinition.versionAlgorithm[x]"/>
          <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="ObservationDefinition.versionAlgorithm[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <strength value="extensible"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/version-algorithm|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.name">
          <path value="ObservationDefinition.name"/>
          <short value="Name for this ObservationDefinition (computer friendly)"/>
          <definition
                      value="A natural language name identifying the ObservationDefinition. 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="ObservationDefinition.name"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <condition value="cnl-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.name"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.title">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.title"/>
          <short value="Name for this ObservationDefinition (human friendly)"/>
          <definition
                      value="A short, descriptive, user-friendly title for the ObservationDefinition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.title"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.status">
          <path value="ObservationDefinition.status"/>
          <short value="draft | active | retired | unknown"/>
          <definition value="The current state of the ObservationDefinition."/>
          <comment
                   value="A nominal state-transition diagram can be found in the [Definition pattern](http://hl7.org/fhir/R5/definition.html#statemachine) documentation
    Unknown does not represent &quot;other&quot; - one of the defined statuses must apply. Unknown is used when the authoring system is not sure what the current status is.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="true"/>
          <isModifierReason value="Not known why this is labelled a modifier"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="PublicationStatus"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Codes identifying the state of an ObservationDefinition."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/publication-status|5.0.0"/>
          </binding>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.status"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.experimental">
          <path value="ObservationDefinition.experimental"/>
          <short value="If for testing purposes, not real usage"/>
          <definition
                      value="A flag to indicate that this ObservationDefinition is authored for testing purposes (or education/evaluation/marketing), and is not intended to be used for genuine usage."/>
          <comment
                   value="Allows filtering of ObservationDefinition that are appropriate for use vs. not."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.experimental"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <meaningWhenMissing
                              value="If absent, this resource is treated as though it is not experimental."/>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.experimental"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.date">
          <path value="ObservationDefinition.date"/>
          <short value="Date last changed"/>
          <definition
                      value="The date (and optionally time) when the ObservationDefinition was last significantly changed. 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 ObservationDefinition changes."/>
          <comment
                   value="The date is often not tracked until the resource is published, but may be present on draft content. Note that this is not the same as the resource last-modified-date, since the resource may be a secondary representation of the ObservationDefinition. Additional specific dates may be added as extensions or be found by consulting Provenances associated with past versions of the resource.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <alias value="revision date"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.date"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.publisher">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.publisher"/>
          <short
                 value="The name of the individual or organization that published the ObservationDefinition"/>
          <definition
                      value="Helps establish the &quot;authority/credibility&quot; of the ObservationDefinition. May also allow for contact."/>
          <requirements
                        value="Usually an organization, but may be an individual. The publisher (or steward) of the ObservationDefinition is the organization or individual primarily responsible for the maintenance and upkeep of the ObservationDefinition. 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 ObservationDefinition. This item SHOULD be populated unless the information is available from context."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.publisher"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.contact">
          <path value="ObservationDefinition.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.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.contact"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.description">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.description"/>
          <short
                 value="Natural language description of the ObservationDefinition"/>
          <definition
                      value="A free text natural language description of the ObservationDefinition from the consumer's perspective."/>
          <comment
                   value="This description can be used to capture details such as comments about misuse, instructions for clinical use and interpretation, literature references, examples from the paper world, etc. It is not a rendering of the module as conveyed in the text field of the resource itself. This item SHOULD be populated unless the information is available from context."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.description"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.useContext">
          <path value="ObservationDefinition.useContext"/>
          <short value="Content intends to support these contexts"/>
          <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 ObservationDefinition instances."/>
          <comment
                   value="When multiple usageContexts are specified, there is no expectation for whether all or any of the contexts apply."/>
          <requirements value="Assist in searching for appropriate content."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.useContext"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.jurisdiction">
          <path value="ObservationDefinition.jurisdiction"/>
          <short
                 value="Intended jurisdiction for this ObservationDefinition (if applicable)"/>
          <definition
                      value="A jurisdiction in which the ObservationDefinition is intended to be used."/>
          <comment
                   value="It may be possible for the ObservationDefinition to be used in jurisdictions other than those for which it was originally designed or intended.

    DEPRECATION NOTE: For consistency, implementations are encouraged to migrate to using the new 'jurisdiction' code in the useContext element.  (I.e. useContext.code indicating http://terminology.hl7.org/CodeSystem/usage-context-type#jurisdiction and useContext.valueCodeableConcept indicating the jurisdiction.)"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <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="Codes for country, country subdivision and region for indicating where a resource is intended to be used."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/jurisdiction|5.0.0"/>
          </binding>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.jurisdiction"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.purpose">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.purpose"/>
          <short value="Why this ObservationDefinition is defined"/>
          <definition
                      value="Explains why this ObservationDefinition is needed and why it has been designed as it has."/>
          <comment
                   value="This element does not describe the usage of the ObservationDefinition. Rather it is for 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 ObservationDefinition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.purpose"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.copyright">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.copyright"/>
          <short value="Use and/or publishing restrictions"/>
          <definition
                      value="Copyright statement relating to the ObservationDefinition and/or its contents. Copyright statements are generally legal restrictions on the use and publishing of the ObservationDefinition."/>
          <requirements
                        value="Consumers of the ObservationDefinition must be able to determine any legal restrictions on the use of the artifact and/or its content."/>
          <alias value="License"/>
          <alias value="Restrictions"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.copyright"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.copyrightLabel">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.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="The (c) symbol should NOT be included in this string. It will be added by software when rendering the notation. Full details about licensing, restrictions, warrantees, etc. goes in the more general 'copyright' element."/>
          <requirements
                        value="Defines the content expected to be rendered in all representations of the artifact."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.copyrightLabel"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.approvalDate">
          <path value="ObservationDefinition.approvalDate"/>
          <short value="When ObservationDefinition was approved by publisher"/>
          <definition
                      value="The date on which the asset content was approved by the publisher. Approval happens once when the content is officially approved for usage."/>
          <comment
                   value="The date may be more recent than the approval date because of minor changes / editorial corrections.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.approvalDate"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.lastReviewDate">
          <path value="ObservationDefinition.lastReviewDate"/>
          <short
                 value="Date on which the asset content was last reviewed by the publisher"/>
          <definition
                      value="The date on which the asset content was last reviewed. Review happens periodically after that, but doesn't change the original approval date."/>
          <comment
                   value="If specified, this is usually after the approval date.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.lastReviewDate"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.effectivePeriod">
          <path value="ObservationDefinition.effectivePeriod"/>
          <short value="The effective date range for the ObservationDefinition"/>
          <definition
                      value="The period during which the ObservationDefinition content was or is planned to be effective."/>
          <comment
                   value="The effective period for an ObservationDefinition determines when the content is applicable for usage and is independent of publication and review dates. For example, an observation definition intended to be used for the year 2021 might be published in 2020.

    See guidance around (not) making local changes to elements [here](http://hl7.org/fhir/R5/canonicalresource.html#localization)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="workflow"/>
            <map value="Definition.effectivePeriod"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.derivedFromCanonical">
          <path value="ObservationDefinition.derivedFromCanonical"/>
          <short value="Based on FHIR definition of another observation"/>
          <definition
                      value="The canonical URL pointing to another FHIR-defined ObservationDefinition that is adhered to in whole or in part by this definition."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.derivedFromCanonical"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.derivedFromUri">
          <path value="ObservationDefinition.derivedFromUri"/>
          <short value="Based on external definition"/>
          <definition
                      value="The URL pointing to an externally-defined observation definition, guideline or other definition that is adhered to in whole or in part by this definition."/>
          <requirements
                        value="Observation definitions may be refinements of other definitions."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.derivedFromUri"/>
            <min value="0"/>
            <max value="*"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.subject">
          <path value="ObservationDefinition.subject"/>
          <short value="Type of subject for the defined observation"/>
          <definition
                      value="A code that describes the intended kind of subject of Observation instances conforming to this ObservationDefinition."/>
          <comment value="Examples: person, animal, device, air, surface …."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.subject"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.performerType">
          <path value="ObservationDefinition.performerType"/>
          <short value="Desired kind of performer for such kind of observation"/>
          <definition
                      value="The type of individual/organization/device that is expected to act upon instances of this definition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.performerType"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="ObservationDefinition.category">
          <path value="ObservationDefinition.category"/>
          <short value="General type of observation"/>
          <definition
                      value="A code that classifies the general type of observation."/>
          <comment
                   value="This element allows various categorization schemes based on the owner’s definition of the category and effectively multiple categories can be used for one instance of ObservationDefinition. The level of granularity is defined by the category concepts in the value set."/>
          <requirements
                        value="Used for filtering what kinds of observations are retrieved and displayed."/>
          <alias value="Class of observation"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.category"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationCategory"/>
            </extension>
            <strength value="example"/>
            <description value="Codes for high level observation categories."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/observation-category|5.0.0"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.class"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".outboundRelationship[typeCode=&quot;COMP].target[classCode=&quot;LIST&quot;, moodCode=&quot;DEF&quot;].code"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code">
          <path value="ObservationDefinition.code"/>
          <short value="Type of observation"/>
          <definition
                      value="Describes what will be observed. Sometimes this is called the observation &quot;name&quot;."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.code"/>
            <min value="1"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationCode"/>
            </extension>
            <strength value="example"/>
            <description value="Codes identifying names of simple observations."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/observation-codes|5.0.0"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.what[x]"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="OM1-2
    OMC-4"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="code"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.id">
          <path value="ObservationDefinition.code.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="id"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <condition value="ele-1"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.extension">
          <path value="ObservationDefinition.code.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 managable, 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())"/>
            <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()"/>
            <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="ObservationDefinition.code.coding">
          <path value="ObservationDefinition.code.coding"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="system"/>
            </discriminator>
            <rules value="open"/>
          </slicing>
          <short value="Code defined by a terminology system"/>
          <definition
                      value="A reference to a code defined by a terminology system."/>
          <comment
                   value="Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.  Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true."/>
          <requirements
                        value="Allows for alternative encodings within a code system, and translations to other code systems."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="CodeableConcept.coding"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.1-8, C*E.10-22"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="union(., ./translation)"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC">
          <path value="ObservationDefinition.code.coding"/>
          <sliceName value="LOINC"/>
          <short value="Code defined by a terminology system"/>
          <definition
                      value="A reference to a code defined by a terminology system."/>
          <comment
                   value="Codes may be defined very casually in enumerations, or code lists, up to very formal definitions such as SNOMED CT - see the HL7 v3 Core Principles for more information.  Ordering of codings is undefined and SHALL NOT be used to infer meaning. Generally, at most only one of the coding values will be labeled as UserSelected = true."/>
          <requirements
                        value="Allows for alternative encodings within a code system, and translations to other code systems."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="CodeableConcept.coding"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.1-8, C*E.10-22"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="union(., ./translation)"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:CodeableConcept.coding rdfs:subPropertyOf dt:CD.coding"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.id">
          <path value="ObservationDefinition.code.coding.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="id"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <condition value="ele-1"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.extension">
          <path value="ObservationDefinition.code.coding.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 managable, 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())"/>
            <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()"/>
            <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="ObservationDefinition.code.coding:LOINC.system">
          <path value="ObservationDefinition.code.coding.system"/>
          <short value="Identity of the terminology system"/>
          <definition
                      value="The identification of the code system that defines the meaning of the symbol in the code."/>
          <comment
                   value="The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...).  OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should be an absolute reference to some definition that establishes the system clearly and unambiguously."/>
          <requirements
                        value="Need to be unambiguous about the source of the definition of the symbol."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.system"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <patternUri value="http://loinc.org"/>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.3"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./codeSystem"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.version">
          <path value="ObservationDefinition.code.coding.version"/>
          <short value="Version of the system - if relevant"/>
          <definition
                      value="The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged."/>
          <comment
                   value="Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.7"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./codeSystemVersion"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.code">
          <path value="ObservationDefinition.code.coding.code"/>
          <short value="Symbol in syntax defined by the system"/>
          <definition
                      value="A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination)."/>
          <requirements
                        value="Need to refer to a particular code in the system."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.code"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <condition value="cod-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.1"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./code"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map value="fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.display">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.code.coding.display"/>
          <short value="Representation defined by the system"/>
          <definition
                      value="A representation of the meaning of the code in the system, following the rules of the system."/>
          <requirements
                        value="Need to be able to carry a human-readable meaning of the code for readers that do not know  the system."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.display"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <condition value="cod-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.2 - but note this is not well followed"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="CV.displayName"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.userSelected">
          <path value="ObservationDefinition.code.coding.userSelected"/>
          <short value="If this coding was chosen directly by the user"/>
          <definition
                      value="Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays)."/>
          <comment
                   value="Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely."/>
          <requirements
                        value="This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.userSelected"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="Sometimes implied by being first"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="CD.codingRationale"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map;   fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [     fhir:source &quot;true&quot;;     fhir:target dt:CDCoding.codingRationale\#O   ]"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.code.text">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.code.text"/>
          <short value="Plain text representation of the concept"/>
          <definition
                      value="A human language representation of the concept as seen/selected/uttered by the user who entered the data and/or which represents the intended meaning of the user."/>
          <comment
                   value="Very often the text is the same as a displayName of one of the codings."/>
          <requirements
                        value="The codes from the terminologies do not always capture the correct meaning with all the nuances of the human using them, or sometimes there is no appropriate code at all. In these cases, the text is used to capture the full meaning of the source."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="CodeableConcept.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.9. But note many systems use C*E.2 for this"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value="./originalText[mediaType/code=&quot;text/plain&quot;]/data"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:CodeableConcept.text rdfs:subPropertyOf dt:CD.originalText"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedDataType">
          <path value="ObservationDefinition.permittedDataType"/>
          <short
                 value="Quantity | CodeableConcept | string | boolean | integer | Range | Ratio | SampledData | time | dateTime | Period"/>
          <definition
                      value="The data types allowed for the value element of the instance observations conforming to this ObservationDefinition."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.permittedDataType"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <example>
            <label value="General"/>
            <valueCode value="CodeableConcept"/>
          </example>
          <condition value="obd-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())"/>
            <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="ObservationDataType"/>
            </extension>
            <strength value="required"/>
            <description value="Permitted data type for observation value."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/permitted-data-type|5.0.0"/>
          </binding>
          <mapping>
            <identity value="v2"/>
            <map value="OM1-3"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.multipleResultsAllowed">
          <path value="ObservationDefinition.multipleResultsAllowed"/>
          <short value="Multiple results allowed for conforming observations"/>
          <definition
                      value="Multiple results allowed for observations conforming to this ObservationDefinition."/>
          <comment
                   value="An example of observation allowing multiple results is &quot;bacteria identified by culture&quot;. Conversely, the measurement of a potassium level allows a single result."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.multipleResultsAllowed"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="boolean"/>
          </type>
          <example>
            <label value="General"/>
            <valueBoolean value="true"/>
          </example>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.bodySite">
          <path value="ObservationDefinition.bodySite"/>
          <short value="Body part to be observed"/>
          <definition
                      value="The site on the subject's body where the  observation is to be made."/>
          <comment
                   value="Only used if the defined observation is to be made directly on a body part and if this body part is not implied by code found in ObservationDefinition.code. Not used for in vitro diagnostic observations.
    Example: 14975008 |Forearm structure|."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.bodySite"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationBodySite"/>
            </extension>
            <strength value="example"/>
            <description value="SNOMED CT body structures."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/body-site|5.0.0"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="targetSiteCode"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.method">
          <path value="ObservationDefinition.method"/>
          <short value="Method used to produce the observation"/>
          <definition
                      value="The method or technique used to perform the observation."/>
          <comment
                   value="Only used if not implicit in observation code
    Example: 702659008 |Automated count technique|."/>
          <requirements value="In some cases, method can impact results."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.method"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationMethod"/>
            </extension>
            <strength value="example"/>
            <description value="Methods for simple observations."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/observation-methods|5.0.0"/>
          </binding>
          <mapping>
            <identity value="v2"/>
            <map value="OM1-14"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="methodCode"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.specimen">
          <path value="ObservationDefinition.specimen"/>
          <short value="Kind of specimen used by this type of observation"/>
          <definition
                      value="The kind of specimen that this type of observation is produced on."/>
          <comment
                   value="Only used for in vitro observations. When multiple occurrences of specimen are present, they are to be combined with a logical AND: all specified specimens  are needed for the observation."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.specimen"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/SpecimenDefinition|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="participation[typeCode=SPC].specimen"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.device">
          <path value="ObservationDefinition.device"/>
          <short value="Measurement device or model of device"/>
          <definition
                      value="The measurement model of device or actual device used to produce observations of this type."/>
          <comment
                   value="When multiple occurrences of device are present, they are to be combined with a logical OR: at least one of the specified devices is used to produce the observation."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.device"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/DeviceDefinition|5.0.0"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Device|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.preferredReportName">
          <path value="ObservationDefinition.preferredReportName"/>
          <short
                 value="The preferred name to be used when reporting the observation results"/>
          <definition
                      value="The preferred name to be used when reporting the results of observations conforming to this ObservationDefinition."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.preferredReportName"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="OM1-9"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit">
          <path value="ObservationDefinition.permittedUnit"/>
          <short value="Unit for quantitative results"/>
          <definition
                      value="Units allowed for the valueQuantity element in the instance observations conforming to this ObservationDefinition."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.permittedUnit"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Coding"/>
          </type>
          <condition value="obd-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())"/>
            <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="ObservationUnit"/>
            </extension>
            <strength value="preferred"/>
            <description value="Codes identifying units of measure."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/ucum-units|5.0.0"/>
          </binding>
          <mapping>
            <identity value="v2"/>
            <map value="OM2-4"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.id">
          <path value="ObservationDefinition.permittedUnit.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="id"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <condition value="ele-1"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.extension">
          <path value="ObservationDefinition.permittedUnit.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 managable, 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())"/>
            <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()"/>
            <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="ObservationDefinition.permittedUnit.system">
          <path value="ObservationDefinition.permittedUnit.system"/>
          <short value="Identity of the terminology system"/>
          <definition
                      value="The identification of the code system that defines the meaning of the symbol in the code."/>
          <comment
                   value="The URI may be an OID (urn:oid:...) or a UUID (urn:uuid:...).  OIDs and UUIDs SHALL be references to the HL7 OID registry. Otherwise, the URI should come from HL7's list of FHIR defined special URIs or it should be an absolute reference to some definition that establishes the system clearly and unambiguously."/>
          <requirements
                        value="Need to be unambiguous about the source of the definition of the symbol."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.system"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <patternUri value="http://unitsofmeasure.org"/>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.3"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./codeSystem"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.system rdfs:subPropertyOf dt:CDCoding.codeSystem"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.version">
          <path value="ObservationDefinition.permittedUnit.version"/>
          <short value="Version of the system - if relevant"/>
          <definition
                      value="The version of the code system which was used when choosing this code. Note that a well-maintained code system does not need the version reported, because the meaning of codes is consistent across versions. However this cannot consistently be assured, and when the meaning is not guaranteed to be consistent, the version SHOULD be exchanged."/>
          <comment
                   value="Where the terminology does not clearly define what string should be used to identify code system versions, the recommendation is to use the date (expressed in FHIR date format) on which that version was officially published as the version date."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.7"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./codeSystemVersion"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.version rdfs:subPropertyOf dt:CDCoding.codeSystemVersion"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.code">
          <path value="ObservationDefinition.permittedUnit.code"/>
          <short value="Symbol in syntax defined by the system"/>
          <definition
                      value="A symbol in syntax defined by the system. The symbol may be a predefined code or an expression in a syntax defined by the coding system (e.g. post-coordination)."/>
          <requirements
                        value="Need to refer to a particular code in the system."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.code"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <condition value="cod-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.1"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="./code"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map value="fhir:Coding.code rdfs:subPropertyOf dt:CDCoding.code"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.display">
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/StructureDefinition/elementdefinition-translatable">
            <valueBoolean value="true"/>
          </extension>
          <path value="ObservationDefinition.permittedUnit.display"/>
          <short value="Representation defined by the system"/>
          <definition
                      value="A representation of the meaning of the code in the system, following the rules of the system."/>
          <requirements
                        value="Need to be able to carry a human-readable meaning of the code for readers that do not know  the system."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.display"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <condition value="cod-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="C*E.2 - but note this is not well followed"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="CV.displayName"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.display rdfs:subPropertyOf dt:CDCoding.displayName"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.permittedUnit.userSelected">
          <path value="ObservationDefinition.permittedUnit.userSelected"/>
          <short value="If this coding was chosen directly by the user"/>
          <definition
                      value="Indicates that this coding was chosen by a user directly - e.g. off a pick list of available items (codes or displays)."/>
          <comment
                   value="Amongst a set of alternatives, a directly chosen code is the most appropriate starting point for new translations. There is some ambiguity about what exactly 'directly chosen' implies, and trading partner agreement may be needed to clarify the use of this element and its consequences more completely."/>
          <requirements
                        value="This has been identified as a clinical safety criterium - that this exact system/code pair was chosen explicitly, rather than inferred by the system based on some rules or language processing."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Coding.userSelected"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="v2"/>
            <map value="Sometimes implied by being first"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="CD.codingRationale"/>
          </mapping>
          <mapping>
            <identity value="orim"/>
            <map
                 value="fhir:Coding.userSelected fhir:mapsTo dt:CDCoding.codingRationale. fhir:Coding.userSelected fhir:hasMap fhir:Coding.userSelected.map. fhir:Coding.userSelected.map a fhir:Map;   fhir:target dt:CDCoding.codingRationale. fhir:Coding.userSelected\#true a [     fhir:source &quot;true&quot;;     fhir:target dt:CDCoding.codingRationale\#O   ]"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.qualifiedValue">
          <path value="ObservationDefinition.qualifiedValue"/>
          <short value="Set of qualified values for observation results"/>
          <definition
                      value="A set of qualified values associated with a context and a set of conditions -  provides a range for quantitative and ordinal observations and a collection of value sets for qualitative observations."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.id">
          <path value="ObservationDefinition.qualifiedValue.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>
          <condition value="ele-1"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.qualifiedValue.extension">
          <path value="ObservationDefinition.qualifiedValue.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 managable, 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())"/>
            <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()"/>
            <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="ObservationDefinition.qualifiedValue.modifierExtension">
          <path value="ObservationDefinition.qualifiedValue.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 managable, 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/R5/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())"/>
            <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()"/>
            <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="ObservationDefinition.qualifiedValue.context">
          <path value="ObservationDefinition.qualifiedValue.context"/>
          <short value="Context qualifier for the set of qualified values"/>
          <definition
                      value="A concept defining the context for this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.context"/>
            <min value="0"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationRangeMeaning"/>
            </extension>
            <strength value="extensible"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/referencerange-meaning|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.qualifiedValue.appliesTo">
          <path value="ObservationDefinition.qualifiedValue.appliesTo"/>
          <short value="Targetted population for the set of qualified values"/>
          <definition
                      value="The target population this  set of qualified values applies to."/>
          <comment
                   value="If this element is not present then the global population is assumed."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.appliesTo"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationRangeAppliesTo"/>
            </extension>
            <strength value="example"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/referencerange-appliesto|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.qualifiedValue.gender">
          <path value="ObservationDefinition.qualifiedValue.gender"/>
          <short value="male | female | other | unknown"/>
          <definition
                      value="The gender this  set of qualified values applies to."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.gender"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <example>
            <label value="General"/>
            <valueCode value="female"/>
          </example>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="AdministrativeGender"/>
            </extension>
            <strength value="required"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/administrative-gender|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.qualifiedValue.age">
          <path value="ObservationDefinition.qualifiedValue.age"/>
          <short value="Applicable age range for the set of qualified values"/>
          <definition
                      value="The age range this  set of qualified values applies to."/>
          <comment value="Some analytes vary greatly over age."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.age"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Range"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.gestationalAge">
          <path value="ObservationDefinition.qualifiedValue.gestationalAge"/>
          <short
                 value="Applicable gestational age range for the set of qualified values"/>
          <definition
                      value="The gestational age this  set of qualified values applies to."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.gestationalAge"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Range"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.condition">
          <path value="ObservationDefinition.qualifiedValue.condition"/>
          <short value="Condition associated with the set of qualified values"/>
          <definition
                      value="Text based condition for which the the set of qualified values is valid."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.condition"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.rangeCategory">
          <path value="ObservationDefinition.qualifiedValue.rangeCategory"/>
          <short value="reference | critical | absolute"/>
          <definition
                      value="The category of range of values for continuous or ordinal observations that match the criteria of this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.rangeCategory"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <example>
            <label value="General"/>
            <valueCode value="critical"/>
          </example>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationRangeCategory"/>
            </extension>
            <strength value="required"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/observation-range-category|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.qualifiedValue.range">
          <path value="ObservationDefinition.qualifiedValue.range"/>
          <short value="The range for continuous or ordinal observations"/>
          <definition
                      value="The range of values defined for continuous or ordinal observations that match the criteria of this set of qualified values."/>
          <requirements
                        value="The unit may be not relevant for ordinal values. In case it is there, it is the same as ObservationDefinition.unit."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.qualifiedValue.range"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Range"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.validCodedValueSet">
          <path value="ObservationDefinition.qualifiedValue.validCodedValueSet"/>
          <short
                 value="Value set of valid coded values as part of this set of qualified values"/>
          <definition
                      value="The set of valid coded results for qualitative observations  that match the criteria of this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path
                  value="ObservationDefinition.qualifiedValue.validCodedValueSet"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ValueSet|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.normalCodedValueSet">
          <path value="ObservationDefinition.qualifiedValue.normalCodedValueSet"/>
          <short
                 value="Value set of normal coded values as part of this set of qualified values"/>
          <definition
                      value="The set of normal coded results for qualitative observations  that match the criteria of this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path
                  value="ObservationDefinition.qualifiedValue.normalCodedValueSet"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ValueSet|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.abnormalCodedValueSet">
          <path
                value="ObservationDefinition.qualifiedValue.abnormalCodedValueSet"/>
          <short
                 value="Value set of abnormal coded values as part of this set of qualified values"/>
          <definition
                      value="The set of abnormal coded results for qualitative observations  that match the criteria of this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path
                  value="ObservationDefinition.qualifiedValue.abnormalCodedValueSet"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ValueSet|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.qualifiedValue.criticalCodedValueSet">
          <path
                value="ObservationDefinition.qualifiedValue.criticalCodedValueSet"/>
          <short
                 value="Value set of critical coded values as part of this set of qualified values"/>
          <definition
                      value="The set of critical coded results for qualitative observations  that match the criteria of this set of qualified values."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path
                  value="ObservationDefinition.qualifiedValue.criticalCodedValueSet"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="canonical"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ValueSet|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.hasMember">
          <path value="ObservationDefinition.hasMember"/>
          <short
                 value="Definitions of related resources belonging to this kind of observation group"/>
          <definition
                      value="This ObservationDefinition defines a group  observation (e.g. a battery, a panel of tests, a set of vital sign measurements) that includes the target as a member of the group."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.hasMember"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition|5.0.0"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Questionnaire|5.0.0"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="ObservationDefinition.component">
          <path value="ObservationDefinition.component"/>
          <short value="Component results"/>
          <definition
                      value="Some observations have multiple component observations, expressed as separate code value pairs."/>
          <requirements
                        value="Component observations share the same attributes as the primary observation and are always treated as a part of it (they are not separable)."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.component"/>
            <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="obd-1"/>
            <severity value="error"/>
            <human
                   value="If permittedUnit exists, then permittedDataType=Quantity must exist."/>
            <expression
                        value="permittedUnit.exists() implies (permittedDataType = 'Quantity').exists()"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="outBoundRelationship[typeCode=COMP]"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.component.id">
          <path value="ObservationDefinition.component.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>
          <condition value="ele-1"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.component.extension">
          <path value="ObservationDefinition.component.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 managable, 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())"/>
            <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()"/>
            <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="ObservationDefinition.component.modifierExtension">
          <path value="ObservationDefinition.component.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 managable, 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/R5/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())"/>
            <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()"/>
            <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="ObservationDefinition.component.code">
          <path value="ObservationDefinition.component.code"/>
          <short value="Type of observation"/>
          <definition value="Describes what will be observed."/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="ObservationDefinition.component.code"/>
            <min value="1"/>
            <max value="1"/>
          </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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationCode"/>
            </extension>
            <strength value="example"/>
            <description value="Codes identifying names of simple observations."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/observation-codes|5.0.0"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map value="code"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.component.permittedDataType">
          <path value="ObservationDefinition.component.permittedDataType"/>
          <short
                 value="Quantity | CodeableConcept | string | boolean | integer | Range | Ratio | SampledData | time | dateTime | Period"/>
          <definition
                      value="The data types allowed for the value element of the instance of this component observations."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.component.permittedDataType"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <example>
            <label value="General"/>
            <valueCode value="CodeableConcept"/>
          </example>
          <condition value="obd-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationDataType"/>
            </extension>
            <strength value="required"/>
            <description value="Permitted data type for observation value."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/permitted-data-type|5.0.0"/>
          </binding>
        </element>
        <element id="ObservationDefinition.component.permittedUnit">
          <path value="ObservationDefinition.component.permittedUnit"/>
          <short value="Unit for quantitative results"/>
          <definition
                      value="Units allowed for the valueQuantity element in the instance observations conforming to this ObservationDefinition."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.component.permittedUnit"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Coding"/>
          </type>
          <condition value="obd-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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="ObservationUnit"/>
            </extension>
            <strength value="preferred"/>
            <description value="Codes identifying units of measure."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/ucum-units|5.0.0"/>
          </binding>
          <mapping>
            <identity value="v2"/>
            <map value="OM2-4"/>
          </mapping>
        </element>
        <element id="ObservationDefinition.component.qualifiedValue">
          <path value="ObservationDefinition.component.qualifiedValue"/>
          <short value="Set of qualified values for observation results"/>
          <definition
                      value="A set of qualified values associated with a context and a set of conditions -  provides a range for quantitative and ordinal observations and a collection of value sets for qualitative observations."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="ObservationDefinition.component.qualifiedValue"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <contentReference
                            value="http://hl7.org/fhir/StructureDefinition/ObservationDefinition#ObservationDefinition.qualifiedValue"/>
          <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())"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
      </snapshot>
      <differential>
        <element id="ObservationDefinition">
          <path value="ObservationDefinition"/>
        </element>
        <element id="ObservationDefinition.code.coding">
          <path value="ObservationDefinition.code.coding"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="system"/>
            </discriminator>
            <rules value="open"/>
          </slicing>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC">
          <path value="ObservationDefinition.code.coding"/>
          <sliceName value="LOINC"/>
          <max value="1"/>
        </element>
        <element id="ObservationDefinition.code.coding:LOINC.system">
          <path value="ObservationDefinition.code.coding.system"/>
          <patternUri value="http://loinc.org"/>
        </element>
        <element id="ObservationDefinition.permittedDataType">
          <path value="ObservationDefinition.permittedDataType"/>
          <mustSupport value="true"/>
        </element>
        <element id="ObservationDefinition.multipleResultsAllowed">
          <path value="ObservationDefinition.multipleResultsAllowed"/>
          <mustSupport value="true"/>
        </element>
        <element id="ObservationDefinition.permittedUnit">
          <path value="ObservationDefinition.permittedUnit"/>
          <mustSupport value="true"/>
        </element>
        <element id="ObservationDefinition.permittedUnit.system">
          <path value="ObservationDefinition.permittedUnit.system"/>
          <patternUri value="http://unitsofmeasure.org"/>
        </element>
      </differential>
    </StructureDefinition>