2026 US Quality Core Implementation Guide
0.5.0 - cibuild US

2026 US Quality Core Implementation Guide, published by Office of the National Coordinator for Health Information Technology (ONC). This guide is not an authorized publication; it is the continuous build for version 0.5.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/FHIR/us-quality-core/ and changes regularly. See the Directory of published versions

## Resource Profile: USQualityCoreAllergyIntolerance - XML Profile

Active as of 2026-05-15

XML representation of the us-quality-core-allergyintolerance resource profile.

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    <StructureDefinition xmlns="http://hl7.org/fhir">
      <id value="us-quality-core-allergyintolerance"/>
      <text>
        <status value="extensions"/>
        <div xmlns="http://www.w3.org/1999/xhtml"><p class="res-header-id"><b>Generated Narrative: StructureDefinition us-quality-core-allergyintolerance</b></p><a name="us-quality-core-allergyintolerance"> </a><a name="hcus-quality-core-allergyintolerance"> </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,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" 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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance" title="The US Quality Core AllergyIntolerance Profile is based upon the US Core AllergyIntolerance Profile which is based upon the core FHIR AllergyIntolerance Resource and created to meet the 2015 Edition Common Clinical Data Set 'Medical allergies' requirements.">AllergyIntolerance</a><a name="AllergyIntolerance"> </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/us/core/STU6.1/StructureDefinition-us-core-allergyintolerance.html">USCoreAllergyIntolerance(6.1.0)</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">Allergy or Intolerance (generally: Risk of adverse reaction to a substance)</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_bck13.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_slice.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Slice Definition" class="hierarchy"/> Slices for extension<a name="AllergyIntolerance.extension"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><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">Content/Rules for all slices</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_bck124.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_slicer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_slice_item.png" alt="." style="background-color: white; background-color: inherit" title="Slice Item" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.extension:resolutionAge" title="Extension URL = http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge">extension:resolutionAge</a><a name="AllergyIntolerance.extension.2"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">0..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/datatypes.html#Age">Age</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">Age that the allergy or intolerance resolved</span><br/><span style="font-weight:bold">URL: </span><a href="http://hl7.org/fhir/extensions/5.3.0/StructureDefinition-allergyintolerance-resolutionAge.html">http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge</a></td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: #F7F7F7"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.type">type</a><a name="AllergyIntolerance.type"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#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">allergy | intolerance - Underlying mechanism (if known)</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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.category">category</a><a name="AllergyIntolerance.category"> </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 style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#code">code</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">food | medication | environment | biologic</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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.criticality">criticality</a><a name="AllergyIntolerance.criticality"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#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">low | high | unable-to-assess</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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.code">code</a><a name="AllergyIntolerance.code"> </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">1</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#CodeableConcept">CodeableConcept</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">(USCDI+ Quality) (USCDI) Code that identifies the allergy or intolerance</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_reference.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Reference to another Resource" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.patient">patient</a><a name="AllergyIntolerance.patient"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">1..1</td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a href="http://hl7.org/fhir/R4/references.html">Reference</a>(<a href="StructureDefinition-us-quality-core-patient.html">US Quality Core Patient</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">(USCDI) Who the sensitivity is for</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_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_choice.gif" alt="." style="background-color: white; background-color: inherit" title="Choice of Types" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.onset[x]">onset[x]</a><a name="AllergyIntolerance.onset_x_"> </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"/><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">(USCDI+ Quality) When allergy or intolerance was identified</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_bck110.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.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_primitive.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <span title="Base StructureDefinition for dateTime Type: A date, date-time or partial date (e.g. just year or year + month).  If hours and minutes are specified, a time zone SHALL be populated. The format is a union of the schema types gYear, gYearMonth, date and dateTime. Seconds must be provided due to schema type constraints but may be zero-filled and may be ignored.                 Dates SHALL be valid dates.">onsetDateTime</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"/><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"><a href="http://hl7.org/fhir/R4/datatypes.html#dateTime">dateTime</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"/></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_bck110.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.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_datatype.gif" alt="." style="background-color: white; background-color: inherit" title="Data Type" class="hierarchy"/> <span title="Base StructureDefinition for Age Type: A duration of time during which an organism (or a process) has existed.">onsetAge</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"/><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"><a href="http://hl7.org/fhir/R4/datatypes.html#Age">Age</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"/></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_bck110.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.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_datatype.gif" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Data Type" class="hierarchy"/> <span title="Base StructureDefinition for Period Type: A time period defined by a start and end date and optionally time.">onsetPeriod</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"/><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"><a href="http://hl7.org/fhir/R4/datatypes.html#Period">Period</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"/></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_bck100.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_datatype.gif" alt="." style="background-color: white; background-color: inherit" title="Data Type" class="hierarchy"/> <span title="Base StructureDefinition for Range Type: A set of ordered Quantities defined by a low and high limit.">onsetRange</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"/><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"><a href="http://hl7.org/fhir/R4/datatypes.html#Range">Range</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"/></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_primitive.png" alt="." style="background-color: #F7F7F7; background-color: inherit" title="Primitive Data Type" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.recordedDate">recordedDate</a><a name="AllergyIntolerance.recordedDate"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</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 href="http://hl7.org/fhir/R4/datatypes.html#dateTime">dateTime</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">(USCDI+ Quality) Date first version of the resource instance was recorded</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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.lastOccurrence">lastOccurrence</a><a name="AllergyIntolerance.lastOccurrence"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#dateTime">dateTime</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">(USCDI+ Quality) Date(/time) of last known occurrence of a reaction</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-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.reaction">reaction</a><a name="AllergyIntolerance.reaction"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#BackboneElement">BackboneElement</a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy">(USCDI+ Quality) (USCDI) Adverse Reaction Events linked to exposure to substance</td></tr>
    <tr style="border: 0px #F0F0F0 solid; padding:0px; vertical-align: top; background-color: white"><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px; white-space: nowrap; background-image: url(tbl_bck010.png)" class="hierarchy"><img src="tbl_spacer.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_blank.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="tbl_vjoin.png" alt="." style="background-color: inherit" class="hierarchy"/><img src="icon_element.gif" alt="." style="background-color: white; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.reaction.manifestation">manifestation</a><a name="AllergyIntolerance.reaction.manifestation"> </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">1</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">*</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: white; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#CodeableConcept">CodeableConcept</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">(USCDI) Clinical symptoms/signs associated with the Event</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_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: #F7F7F7; background-color: inherit" title="Element" class="hierarchy"/> <a href="StructureDefinition-us-quality-core-allergyintolerance-definitions.html#AllergyIntolerance.reaction.severity">severity</a><a name="AllergyIntolerance.reaction.severity"> </a></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"/><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><span style="opacity: 0.5">0</span><span style="opacity: 0.5">..</span><span style="opacity: 0.5">1</span></td><td style="vertical-align: top; text-align : var(--ig-left,left); background-color: #F7F7F7; border: 0px #F0F0F0 solid; padding:0px 4px 0px 4px" class="hierarchy"><a style="opacity: 0.5; opacity: 0.5" href="http://hl7.org/fhir/R4/datatypes.html#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">mild | moderate | severe (of event as a whole)</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,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" alt="doco" style="background-color: inherit"/> Documentation for this format</a></td></tr></table></div>
      </text>
      <url
           value="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-allergyintolerance"/>
      <version value="0.5.0"/>
      <name value="USQualityCoreAllergyIntolerance"/>
      <title value="US Quality Core AllergyIntolerance"/>
      <status value="active"/>
      <experimental value="false"/>
      <date value="2026-05-15"/>
      <publisher
                 value="Office of the National Coordinator for Health Information Technology (ONC)"/>
      <contact>
        <name
              value="Office of the National Coordinator for Health Information Technology (ONC)"/>
        <telecom>
          <system value="url"/>
          <value value="https://www.healthit.gov/feedback"/>
        </telecom>
      </contact>
      <description
                   value="Profile of AllergyIntolerance for decision support/quality metrics. Defines the core set of elements and extensions for quality rule and measure authors."/>
      <jurisdiction>
        <coding>
          <system value="urn:iso:std:iso:3166"/>
          <code value="US"/>
          <display value="United States of America"/>
        </coding>
        <text value="USA"/>
      </jurisdiction>
      <fhirVersion value="4.0.1"/>
      <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="v2"/>
        <uri value="http://hl7.org/v2"/>
        <name value="HL7 v2 Mapping"/>
      </mapping>
      <kind value="resource"/>
      <abstract value="false"/>
      <type value="AllergyIntolerance"/>
      <baseDefinition
                      value="http://hl7.org/fhir/us/core/StructureDefinition/us-core-allergyintolerance|6.1.0"/>
      <derivation value="constraint"/>
      <snapshot>
        <extension
                   url="http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version">
          <valueString value="6.1.0"/>
        </extension>
        <element id="AllergyIntolerance">
          <path value="AllergyIntolerance"/>
          <short
                 value="Allergy or Intolerance (generally: Risk of adverse reaction to a substance)"/>
          <definition
                      value="The US Quality Core AllergyIntolerance Profile is based upon the US Core AllergyIntolerance Profile which is based upon the core FHIR AllergyIntolerance Resource and created to meet the 2015 Edition Common Clinical Data Set 'Medical allergies' requirements."/>
          <comment value="\-"/>
          <alias value="Allergy"/>
          <alias value="Intolerance"/>
          <alias value="Adverse Reaction"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <constraint>
            <key value="ait-1"/>
            <severity value="error"/>
            <human
                   value="AllergyIntolerance.clinicalStatus SHALL be present if verificationStatus is not entered-in-error."/>
            <expression
                        value="verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').exists() or clinicalStatus.exists()"/>
            <xpath
                   value="f:verificationStatus/f:coding/f:code/@value='entered-in-error' or exists(f:clinicalStatus)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/AllergyIntolerance"/>
          </constraint>
          <constraint>
            <key value="ait-2"/>
            <severity value="error"/>
            <human
                   value="AllergyIntolerance.clinicalStatus SHALL NOT be present if verification Status is entered-in-error"/>
            <expression
                        value="verificationStatus.coding.where(system = 'http://terminology.hl7.org/CodeSystem/allergyintolerance-verification' and code = 'entered-in-error').empty() or clinicalStatus.empty()"/>
            <xpath
                   value="not(f:verificationStatus/f:coding/f:code/@value='entered-in-error') or not(exists(f:clinicalStatus))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/AllergyIntolerance"/>
          </constraint>
          <constraint>
            <key value="dom-2"/>
            <severity value="error"/>
            <human
                   value="If the resource is contained in another resource, it SHALL NOT contain nested Resources"/>
            <expression value="contained.contained.empty()"/>
            <xpath value="not(parent::f:contained and f:contained)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-3"/>
            <severity value="error"/>
            <human
                   value="If the resource is contained in another resource, it SHALL be referred to from elsewhere in the resource or SHALL refer to the containing resource"/>
            <expression
                        value="contained.where((('#'+id in (%resource.descendants().reference | %resource.descendants().as(canonical) | %resource.descendants().as(uri) | %resource.descendants().as(url))) or descendants().where(reference = '#').exists() or descendants().where(as(canonical) = '#').exists() or descendants().where(as(canonical) = '#').exists()).not()).trace('unmatched', id).empty()"/>
            <xpath
                   value="not(exists(for $id in f:contained/*/f:id/@value return $contained[not(parent::*/descendant::f:reference/@value=concat('#', $contained/*/id/@value) or descendant::f:reference[@value='#'])]))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-4"/>
            <severity value="error"/>
            <human
                   value="If a resource is contained in another resource, it SHALL NOT have a meta.versionId or a meta.lastUpdated"/>
            <expression
                        value="contained.meta.versionId.empty() and contained.meta.lastUpdated.empty()"/>
            <xpath
                   value="not(exists(f:contained/*/f:meta/f:versionId)) and not(exists(f:contained/*/f:meta/f:lastUpdated))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <key value="dom-5"/>
            <severity value="error"/>
            <human
                   value="If a resource is contained in another resource, it SHALL NOT have a security label"/>
            <expression value="contained.meta.security.empty()"/>
            <xpath value="not(exists(f:contained/*/f:meta/f:security))"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <constraint>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice">
              <valueBoolean value="true"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bestpractice-explanation">
              <valueMarkdown
                             value="When a resource has no narrative, only systems that fully understand the data can display the resource to a human safely. Including a human readable representation in the resource makes for a much more robust eco-system and cheaper handling of resources by intermediary systems. Some ecosystems restrict distribution of resources to only those systems that do fully understand the resources, and as a consequence implementers may believe that the narrative is superfluous. However experience shows that such eco-systems often open up to new participants over time."/>
            </extension>
            <key value="dom-6"/>
            <severity value="warning"/>
            <human
                   value="A resource should have narrative for robust management"/>
            <expression value="text.`div`.exists()"/>
            <xpath value="exists(f:text/h:div)"/>
            <source
                    value="http://hl7.org/fhir/StructureDefinition/DomainResource"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="Entity. Role, or Act"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="Observation[classCode=OBS, moodCode=EVN]"/>
          </mapping>
          <mapping>
            <identity value="argonaut-dq-dstu2"/>
            <map value="AllergyIntolerance"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.id">
          <path value="AllergyIntolerance.id"/>
          <short value="Logical id of this artifact"/>
          <definition
                      value="The logical id of the resource, as used in the URL for the resource. Once assigned, this value never changes."/>
          <comment
                   value="The only time that a resource does not have an id is when it is being submitted to the server using a create operation."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="id"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="AllergyIntolerance.meta">
          <path value="AllergyIntolerance.meta"/>
          <short value="Metadata about the resource"/>
          <definition
                      value="The metadata about the resource. This is content that is maintained by the infrastructure. Changes to the content might not always be associated with version changes to the resource."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.meta"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Meta"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
        </element>
        <element id="AllergyIntolerance.implicitRules">
          <path value="AllergyIntolerance.implicitRules"/>
          <short value="A set of rules under which this content was created"/>
          <definition
                      value="A reference to a set of rules that were followed when the resource was constructed, and which must be understood when processing the content. Often, this is a reference to an implementation guide that defines the special rules along with other profiles etc."/>
          <comment
                   value="Asserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element. Often, when used, the URL is a reference to an implementation guide that defines these special rules as part of it's narrative along with other profiles, value sets, etc."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.implicitRules"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="uri"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="This element is labeled as a modifier because the implicit rules may provide additional knowledge about the resource that modifies it's meaning or interpretation"/>
          <isSummary value="true"/>
        </element>
        <element id="AllergyIntolerance.language">
          <path value="AllergyIntolerance.language"/>
          <short value="Language of the resource content"/>
          <definition
                      value="The base language in which the resource is written."/>
          <comment
                   value="Language is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies  to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource. Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute)."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Resource.language"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-maxValueSet">
              <valueCanonical value="http://hl7.org/fhir/ValueSet/all-languages"/>
            </extension>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="Language"/>
            </extension>
            <strength value="preferred"/>
            <description value="A human language."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/languages"/>
          </binding>
        </element>
        <element id="AllergyIntolerance.text">
          <path value="AllergyIntolerance.text"/>
          <short value="Text summary of the resource, for human interpretation"/>
          <definition
                      value="A human-readable narrative that contains a summary of the resource and can be used to represent the content of the resource to a human. The narrative need not encode all the structured data, but is required to contain sufficient detail to make it &quot;clinically safe&quot; for a human to just read the narrative. Resource definitions may define what content should be represented in the narrative to ensure clinical safety."/>
          <comment
                   value="Contained resources do not have narrative. Resources that are not contained SHOULD have a narrative. In some cases, a resource may only have text with little or no additional discrete data (as long as all minOccurs=1 elements are satisfied).  This may be necessary for data from legacy systems where information is captured as a &quot;text blob&quot; or where text is additionally entered raw or narrated and encoded information is added later."/>
          <alias value="narrative"/>
          <alias value="html"/>
          <alias value="xhtml"/>
          <alias value="display"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.text"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Narrative"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="Act.text?"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.contained">
          <path value="AllergyIntolerance.contained"/>
          <short value="Contained, inline Resources"/>
          <definition
                      value="These resources do not have an independent existence apart from the resource that contains them - they cannot be identified independently, and nor can they have their own independent transaction scope."/>
          <comment
                   value="This should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again. Contained resources may have profiles and tags In their meta elements, but SHALL NOT have security labels."/>
          <alias value="inline resources"/>
          <alias value="anonymous resources"/>
          <alias value="contained resources"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.contained"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Resource"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.extension">
          <path value="AllergyIntolerance.extension"/>
          <slicing>
            <discriminator>
              <type value="value"/>
              <path value="url"/>
            </discriminator>
            <ordered value="false"/>
            <rules value="open"/>
          </slicing>
          <short value="Extension"/>
          <definition value="An Extension"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="AllergyIntolerance.extension:resolutionAge">
          <path value="AllergyIntolerance.extension"/>
          <sliceName value="resolutionAge"/>
          <short value="Age that the allergy or intolerance resolved"/>
          <definition
                      value="The estimated patient age at which the allergy or intolerance resolved. Should be specified only if the status is resolved."/>
          <comment
                   value="Removed Date since it is hard to imagine knowing the date an allergy abated. The assertion date is already captured."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="DomainResource.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge"/>
          </type>
          <condition value="ele-1"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
        </element>
        <element id="AllergyIntolerance.modifierExtension">
          <path value="AllergyIntolerance.modifierExtension"/>
          <short value="Extensions that cannot be ignored"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the resource and that modifies the understanding of the element that contains it and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="DomainResource.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the resource that contains them"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.identifier">
          <path value="AllergyIntolerance.identifier"/>
          <short value="External ids for this item"/>
          <definition
                      value="Business identifiers assigned to this AllergyIntolerance by the performer or other systems which remain constant as the resource is updated and propagates from server to server."/>
          <comment
                   value="This is a business identifier, not a resource identifier (see [discussion](http://hl7.org/fhir/R4/resource.html#identifiers)).  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.  For example, multiple Patient and a Person resource instance might share the same social insurance number."/>
          <requirements
                        value="Allows identification of the AllergyIntolerance as it is known by various participating systems and in a way that remains consistent across servers."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.identifier"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Identifier"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.identifier"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="IAM-7"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="id"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.clinicalStatus">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.clinicalStatus"/>
          <short value="(USCDI) active | inactive | resolved"/>
          <definition value="The clinical status of the allergy or intolerance."/>
          <comment
                   value="Refer to [discussion](http://hl7.org/fhir/R4/extensibility.html#Special-Case) if clincalStatus is missing data.
    The data type is CodeableConcept because clinicalStatus has some clinical judgment involved, such that there might need to be more specificity than the required FHIR value set allows. For example, a SNOMED coding might allow for additional specificity."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.clinicalStatus"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <condition value="ait-1"/>
          <condition value="ait-2"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="true"/>
          <isModifierReason
                            value="This element is labeled as a modifier because the status contains the codes inactive and resolved that mark the AllergyIntolerance as no longer active."/>
          <isSummary value="true"/>
          <binding>
            <strength value="required"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/allergyintolerance-clinical"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.status"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value="Observation ACT .inboundRelationship[typeCode=COMP].source[classCode=OBS, code=&quot;clinicalStatus&quot;, moodCode=EVN].value"/>
          </mapping>
          <mapping>
            <identity value="argonaut-dq-dstu2"/>
            <map value="AllergyIntolerance.status"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.verificationStatus">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.verificationStatus"/>
          <short
                 value="(USCDI) unconfirmed | confirmed | refuted | entered-in-error"/>
          <definition
                      value="Assertion about certainty associated with the propensity, or potential risk, of a reaction to the identified substance (including pharmaceutical product)."/>
          <comment
                   value="The data type is CodeableConcept because verificationStatus has some clinical judgment involved, such that there might need to be more specificity than the required FHIR value set allows. For example, a SNOMED coding might allow for additional specificity."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.verificationStatus"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <condition value="ait-1"/>
          <condition value="ait-2"/>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="true"/>
          <isModifierReason
                            value="This element is labeled as a modifier because the status contains the codes refuted and entered-in-error that mark the AllergyIntolerance as not currently valid."/>
          <isSummary value="true"/>
          <binding>
            <strength value="required"/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/allergyintolerance-verification"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.status"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value="Observation ACT .inboundRelationship[typeCode=COMP].source[classCode=OBS, code=&quot;verificationStatus&quot;, moodCode=EVN].value"/>
          </mapping>
          <mapping>
            <identity value="argonaut-dq-dstu2"/>
            <map value="AllergyIntolerance.status"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.type">
          <path value="AllergyIntolerance.type"/>
          <short value="allergy | intolerance - Underlying mechanism (if known)"/>
          <definition
                      value="Identification of the underlying physiological mechanism for the reaction risk."/>
          <comment
                   value="Allergic (typically immune-mediated) reactions have been traditionally regarded as an indicator for potential escalation to significant future risk. Contemporary knowledge suggests that some reactions previously thought to be immune-mediated are, in fact, non-immune, but in some cases can still pose a life threatening risk. It is acknowledged that many clinicians might not be in a position to distinguish the mechanism of a particular reaction. Often the term &quot;allergy&quot; is used rather generically and may overlap with the use of &quot;intolerance&quot; - in practice the boundaries between these two concepts might not be well-defined or understood. This data element is included nevertheless, because many legacy systems have captured this attribute. Immunologic testing may provide supporting evidence for the basis of the reaction and the causative substance, but no tests are 100% sensitive or specific for sensitivity to a particular substance. If, as is commonly the case, it is unclear whether the reaction is due to an allergy or an intolerance, then the type element should be omitted from the resource."/>
          <alias value="Category"/>
          <alias value="Class"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.type"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="AllergyIntoleranceType"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Identification of the underlying physiological mechanism for a Reaction Risk."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/allergy-intolerance-type|4.0.1"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.class"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="IAM-9"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="code"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.category">
          <path value="AllergyIntolerance.category"/>
          <short value="food | medication | environment | biologic"/>
          <definition value="Category of the identified substance."/>
          <comment
                   value="This data element has been included because it is currently being captured in some clinical systems. This data can be derived from the substance where coding systems are used, and is effectively redundant in that situation.  When searching on category, consider the implications of AllergyIntolerance resources without a category.  For example, when searching on category = medication, medication allergies that don't have a category valued will not be returned.  Refer to [search](http://hl7.org/fhir/R4/search.html) for more information on how to search category with a :missing modifier to get allergies that don't have a category.  Additionally, category should be used with caution because category can be subjective based on the sender."/>
          <alias value="Category"/>
          <alias value="Type"/>
          <alias value="Reaction Type"/>
          <alias value="Class"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.category"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="AllergyIntoleranceCategory"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Category of an identified substance associated with allergies or intolerances."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/allergy-intolerance-category|4.0.1"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.class"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="AL1-2"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="value &lt; IntoleranceValue (Agent)"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.criticality">
          <path value="AllergyIntolerance.criticality"/>
          <short value="low | high | unable-to-assess"/>
          <definition
                      value="Estimate of the potential clinical harm, or seriousness, of the reaction to the identified substance."/>
          <comment
                   value="The default criticality value for any propensity to an adverse reaction should be 'Low Risk', indicating at the very least a relative contraindication to deliberate or voluntary exposure to the substance. 'High Risk' is flagged if the clinician has identified a propensity for a more serious or potentially life-threatening reaction, such as anaphylaxis, and implies an absolute contraindication to deliberate or voluntary exposure to the substance. If this element is missing, the criticality is unknown (though it may be known elsewhere).  Systems that capture a severity at the condition level are actually representing the concept of criticality whereas the severity documented at the reaction level is representing the true reaction severity.  Existing systems that are capturing both condition criticality and reaction severity may use the term &quot;severity&quot; to represent both.  Criticality is the worst it could be in the future (i.e. situation-agnostic) whereas severity is situation-dependent."/>
          <alias value="Severity"/>
          <alias value="Seriousness"/>
          <alias value="Contra-indication"/>
          <alias value="Risk"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.criticality"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="AllergyIntoleranceCriticality"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Estimate of the potential clinical harm, or seriousness, of a reaction to an identified substance."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/allergy-intolerance-criticality|4.0.1"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.grade"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="AL1-4"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value="inboundRelationship[typeCode=SUBJ].source[classCode=OBS, moodCode=EVN, code=SEV, value &lt;= SeverityObservation (Severity Level)]"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.code">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.code"/>
          <short
                 value="(USCDI+ Quality) (USCDI) Code that identifies the allergy or intolerance"/>
          <definition
                      value="Code for an allergy or intolerance statement (either a positive or a negated/excluded statement).  This may be a code for a substance or pharmaceutical product that is considered to be responsible for the adverse reaction risk (e.g., &quot;Latex&quot;), an allergy or intolerance condition (e.g., &quot;Latex allergy&quot;), or a negated/excluded code for a specific substance or class (e.g., &quot;No latex allergy&quot;) or a general or categorical negated statement (e.g.,  &quot;No known allergy&quot;, &quot;No known drug allergies&quot;).  Note: the substance for a specific reaction may be different from the substance identified as the cause of the risk, but it must be consistent with it. For instance, it may be a more specific substance (e.g. a brand medication) or a composite product that includes the identified substance. It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.  If a receiving system is unable to confirm that AllergyIntolerance.reaction.substance falls within the semantic scope of AllergyIntolerance.code, then the receiving system should ignore AllergyIntolerance.reaction.substance."/>
          <comment
                   value="It is strongly recommended that this element be populated using a terminology, where possible. For example, some terminologies used include RxNorm, SNOMED CT, DM+D, NDFRT, ICD-9, IDC-10, UNII, and ATC. Plain text should only be used if there is no appropriate terminology available. Additional details can be specified in the text.

    When a substance or product code is specified for the 'code' element, the &quot;default&quot; semantic context is that this is a positive statement of an allergy or intolerance (depending on the value of the 'type' element, if present) condition to the specified substance/product.  In the corresponding SNOMED CT allergy model, the specified substance/product is the target (destination) of the &quot;Causative agent&quot; relationship.

    The 'substanceExposureRisk' extension is available as a structured and more flexible alternative to the 'code' element for making positive or negative allergy or intolerance statements.  This extension provides the capability to make &quot;no known allergy&quot; (or &quot;no risk of adverse reaction&quot;) statements regarding any coded substance/product (including cases when a pre-coordinated &quot;no allergy to x&quot; concept for that substance/product does not exist).  If the 'substanceExposureRisk' extension is present, the AllergyIntolerance.code element SHALL be omitted."/>
          <alias value="Code"/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.code"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <binding>
            <strength value="extensible"/>
            <valueSet
                      value="http://cts.nlm.nih.gov/fhir/ValueSet/2.16.840.1.113762.1.4.1186.8"/>
          </binding>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.what[x]"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="AL1-3 / IAM-3"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value="substance/product:

    .participation[typeCode=CAGNT].role[classCode=ADMM].player[classCode=MAT, determinerCode=KIND, code &lt;= ExposureAgentEntityType]

    negated/excluded substance/product:

    .participation[typeCode=CAGNT, negationInd=true].role[classCode=ADMM].player[classCode=MAT, determinerCode=KIND, code &lt;= ExposureAgentEntityType]

    positive or negated/excluded condition/situation:

    Observation.code=ASSERTION; Observation.value"/>
          </mapping>
          <mapping>
            <identity value="argonaut-dq-dstu2"/>
            <map value="AllergyIntolerance.substance"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.patient">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.patient"/>
          <short value="(USCDI) Who the sensitivity is for"/>
          <definition value="The patient who has the allergy or intolerance."/>
          <alias value="Patient"/>
          <min value="1"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.patient"/>
            <min value="1"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-patient"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.subject[x]"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="(PID-3)"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=SBJ].role[classCode=PAT]"/>
          </mapping>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.subject"/>
          </mapping>
          <mapping>
            <identity value="argonaut-dq-dstu2"/>
            <map value="AllergyIntolerance.patient"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.encounter">
          <path value="AllergyIntolerance.encounter"/>
          <short value="Encounter when the allergy or intolerance was asserted"/>
          <definition
                      value="The encounter when the allergy or intolerance was asserted."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.encounter"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Encounter"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.context"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map
                 value=".inboundRelationship[typeCode=COMP].source[classCode=ENC, moodCode=EVN]"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.onset[x]">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.onset[x]"/>
          <short
                 value="(USCDI+ Quality) When allergy or intolerance was identified"/>
          <definition
                      value="Estimated or actual date,  date-time, or age when allergy or intolerance was identified."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.onset[x]"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
          <type>
            <code value="Age"/>
          </type>
          <type>
            <code value="Period"/>
          </type>
          <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="false"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.init"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="effectiveTime.low"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.recordedDate">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.recordedDate"/>
          <short
                 value="(USCDI+ Quality) Date first version of the resource instance was recorded"/>
          <definition
                      value="The recordedDate represents when this particular AllergyIntolerance record was created in the system, which is often a system-generated date."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.recordedDate"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.recorded"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="IAM-13"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=AUT].time"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.recorder">
          <path value="AllergyIntolerance.recorder"/>
          <short value="Who recorded the sensitivity"/>
          <definition
                      value="Individual who recorded the record and takes responsibility for its content."/>
          <alias value="Author"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.recorder"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Practitioner"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/PractitionerRole"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Patient"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.author"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=AUT].role"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.asserter">
          <path value="AllergyIntolerance.asserter"/>
          <short value="Source of the information about the allergy"/>
          <definition
                      value="The source of the information about the allergy that is recorded."/>
          <comment
                   value="The recorder takes responsibility for the content, but can reference the source from where they got it."/>
          <alias value="Source"/>
          <alias value="Informant"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.asserter"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Patient"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/RelatedPerson"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/Practitioner"/>
            <targetProfile
                           value="http://hl7.org/fhir/StructureDefinition/PractitionerRole"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="w5"/>
            <map value="FiveWs.source"/>
          </mapping>
          <mapping>
            <identity value="v2"/>
            <map value="IAM-14 (if patient) / IAM-18 (if practitioner)"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value=".participation[typeCode=INF].role"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.lastOccurrence">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.lastOccurrence"/>
          <short
                 value="(USCDI+ Quality) Date(/time) of last known occurrence of a reaction"/>
          <definition
                      value="Represents the date and/or time of the last known occurrence of a reaction event."/>
          <comment
                   value="This date may be replicated by one of the Onset of Reaction dates. Where a textual representation of the date of last occurrence is required e.g. 'In Childhood, '10 years ago' the Comment element should be used."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.lastOccurrence"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map
                 value="outBoundRelationship[typeCode=SUBJ].target[classCode=OBS, moodCode=EVN, code &lt;= CommonClinicalObservationType, value &lt;= ObservationValue (Reaction Type)].effectiveTime"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.note">
          <path value="AllergyIntolerance.note"/>
          <short value="Additional text not captured in other fields"/>
          <definition
                      value="Additional narrative about the propensity for the Adverse Reaction, not captured in other fields."/>
          <comment
                   value="For example: including reason for flagging a seriousness of 'High Risk'; and instructions related to future exposure or administration of the substance, such as administration within an Intensive Care Unit or under corticosteroid cover. The notes should be related to an allergy or intolerance as a condition in general and not related to any particular episode of it. For episode notes and descriptions, use AllergyIntolerance.event.description and  AllergyIntolerance.event.notes."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.note"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Annotation"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map
                 value="subjectOf.observationEvent[code=&quot;annotation&quot;].value"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.reaction"/>
          <short
                 value="(USCDI+ Quality) (USCDI) Adverse Reaction Events linked to exposure to substance"/>
          <definition
                      value="Details about each adverse reaction event linked to exposure to the identified substance."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.reaction"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="BackboneElement"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map
                 value="outBoundRelationship[typeCode=SUBJ].target[classCode=OBS, moodCode=EVN, code &lt;= CommonClinicalObservationType, value &lt;= ObservationValue (Reaction Type)]"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.id">
          <path value="AllergyIntolerance.reaction.id"/>
          <representation value="xmlAttr"/>
          <short value="Unique id for inter-element referencing"/>
          <definition
                      value="Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="Element.id"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type">
              <valueUrl value="string"/>
            </extension>
            <code value="http://hl7.org/fhirpath/System.String"/>
          </type>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.extension">
          <path value="AllergyIntolerance.reaction.extension"/>
          <short value="Additional content defined by implementations"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element. To make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="Element.extension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="n/a"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.modifierExtension">
          <path value="AllergyIntolerance.reaction.modifierExtension"/>
          <short value="Extensions that cannot be ignored even if unrecognized"/>
          <definition
                      value="May be used to represent additional information that is not part of the basic definition of the element and that modifies the understanding of the element in which it is contained and/or the understanding of the containing element's descendants. Usually modifier elements provide negation or qualification. To make the use of extensions safe and manageable, there is a strict set of governance applied to the definition and use of extensions. Though any implementer can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension. Applications processing a resource are required to check for modifier extensions.

    Modifier extensions SHALL NOT change the meaning of any elements on Resource or DomainResource (including cannot change the meaning of modifierExtension itself)."/>
          <comment
                   value="There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone."/>
          <requirements
                        value="Modifier extensions allow for extensions that *cannot* be safely ignored to be clearly distinguished from the vast majority of extensions which can be safely ignored.  This promotes interoperability by eliminating the need for implementers to prohibit the presence of extensions. For further information, see the [definition of modifier extensions](http://hl7.org/fhir/R4/extensibility.html#modifierExtension)."/>
          <alias value="extensions"/>
          <alias value="user content"/>
          <alias value="modifiers"/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="BackboneElement.modifierExtension"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Extension"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <constraint>
            <key value="ext-1"/>
            <severity value="error"/>
            <human value="Must have either extensions or value[x], not both"/>
            <expression value="extension.exists() != value.exists()"/>
            <xpath
                   value="exists(f:extension)!=exists(f:*[starts-with(local-name(.), &quot;value&quot;)])"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Extension"/>
          </constraint>
          <isModifier value="true"/>
          <isModifierReason
                            value="Modifier extensions are expected to modify the meaning or interpretation of the element that contains them"/>
          <isSummary value="true"/>
          <mapping>
            <identity value="rim"/>
            <map value="N/A"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.substance">
          <path value="AllergyIntolerance.reaction.substance"/>
          <short
                 value="Specific substance or pharmaceutical product considered to be responsible for event"/>
          <definition
                      value="Identification of the specific substance (or pharmaceutical product) considered to be responsible for the Adverse Reaction event. Note: the substance for a specific reaction may be different from the substance identified as the cause of the risk, but it must be consistent with it. For instance, it may be a more specific substance (e.g. a brand medication) or a composite product that includes the identified substance. It must be clinically safe to only process the 'code' and ignore the 'reaction.substance'.  If a receiving system is unable to confirm that AllergyIntolerance.reaction.substance falls within the semantic scope of AllergyIntolerance.code, then the receiving system should ignore AllergyIntolerance.reaction.substance."/>
          <comment
                   value="Coding of the specific substance (or pharmaceutical product) with a terminology capable of triggering decision support should be used wherever possible.  The 'code' element allows for the use of a specific substance or pharmaceutical product, or a group or class of substances. In the case of an allergy or intolerance to a class of substances, (for example, &quot;penicillins&quot;), the 'reaction.substance' element could be used to code the specific substance that was identified as having caused the reaction (for example, &quot;amoxycillin&quot;). Duplication of the value in the 'code' and 'reaction.substance' elements is acceptable when a specific substance has been recorded in 'code'."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.reaction.substance"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="SubstanceCode"/>
            </extension>
            <strength value="example"/>
            <description
                         value="Codes defining the type of the substance (including pharmaceutical products)."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/substance-code"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map
                 value="outBoundRelationship[typeCode=SAS].target[classCode=SBADM, code &lt;= ExposureCode].participation[typeCode=CSM].role[classCode=ADMM].player[classCode=MAT, determinerCode=KIND, code &lt;= ExposureAgentEntityType]"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.manifestation">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.reaction.manifestation"/>
          <short
                 value="(USCDI) Clinical symptoms/signs associated with the Event"/>
          <definition
                      value="Clinical symptoms and/or signs that are observed or associated with the adverse reaction event."/>
          <comment
                   value="Manifestation can be expressed as a single word, phrase or brief description. For example: nausea, rash or no reaction. It is preferable that manifestation should be coded with a terminology, where possible. The values entered here may be used to display on an application screen as part of a list of adverse reactions, as recommended in the UK NHS CUI guidelines.  Terminologies commonly used include, but are not limited to, SNOMED CT or ICD10."/>
          <alias value="Symptoms"/>
          <alias value="Signs"/>
          <min value="1"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.reaction.manifestation"/>
            <min value="1"/>
            <max value="*"/>
          </base>
          <type>
            <code value="CodeableConcept"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <mustSupport value="true"/>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <strength value="extensible"/>
            <valueSet value="http://hl7.org/fhir/ValueSet/clinical-findings"/>
          </binding>
          <mapping>
            <identity value="v2"/>
            <map value="AL1-5"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="code"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.description">
          <path value="AllergyIntolerance.reaction.description"/>
          <short value="Description of the event as a whole"/>
          <definition
                      value="Text description about the reaction as a whole, including details of the manifestation if required."/>
          <comment
                   value="Use the description to provide any details of a particular event of the occurred reaction such as circumstances, reaction specifics, what happened before/after. Information, related to the event, but not describing a particular care should be captured in the comment field. For example: at the age of four, the patient was given penicillin for strep throat and subsequently developed severe hives."/>
          <alias value="Narrative"/>
          <alias value="Text"/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.reaction.description"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="string"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map value="text"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.onset">
          <path value="AllergyIntolerance.reaction.onset"/>
          <short value="Date(/time) when manifestations showed"/>
          <definition
                      value="Record of the date and/or time of the onset of the Reaction."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.reaction.onset"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="dateTime"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="v2"/>
            <map value="AL1-6"/>
          </mapping>
          <mapping>
            <identity value="rim"/>
            <map value="effectiveTime.low"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.severity">
          <path value="AllergyIntolerance.reaction.severity"/>
          <short value="mild | moderate | severe (of event as a whole)"/>
          <definition
                      value="Clinical assessment of the severity of the reaction event as a whole, potentially considering multiple different manifestations."/>
          <comment
                   value="It is acknowledged that this assessment is very subjective. There may be some specific practice domains where objective scales have been applied. Objective scales can be included in this model as extensions."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.reaction.severity"/>
            <min value="0"/>
            <max value="1"/>
          </base>
          <type>
            <code value="code"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="AllergyIntoleranceSeverity"/>
            </extension>
            <strength value="required"/>
            <description
                         value="Clinical assessment of the severity of a reaction event as a whole, potentially considering multiple different manifestations."/>
            <valueSet
                      value="http://hl7.org/fhir/ValueSet/reaction-event-severity|4.0.1"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map
                 value="inboundRelationship[typeCode=SUBJ].source[classCode=OBS, moodCode=EVN, code=SEV, value &lt;= SeverityObservation (Severity Level)]"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.exposureRoute">
          <path value="AllergyIntolerance.reaction.exposureRoute"/>
          <short value="How the subject was exposed to the substance"/>
          <definition
                      value="Identification of the route by which the subject was exposed to the substance."/>
          <comment
                   value="Coding of the route of exposure with a terminology should be used wherever possible."/>
          <min value="0"/>
          <max value="1"/>
          <base>
            <path value="AllergyIntolerance.reaction.exposureRoute"/>
            <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())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <binding>
            <extension
                       url="http://hl7.org/fhir/StructureDefinition/elementdefinition-bindingName">
              <valueString value="RouteOfAdministration"/>
            </extension>
            <strength value="example"/>
            <description
                         value="A coded concept describing the route or physiological path of administration of a therapeutic agent into or onto the body of a subject."/>
            <valueSet value="http://hl7.org/fhir/ValueSet/route-codes"/>
          </binding>
          <mapping>
            <identity value="rim"/>
            <map
                 value="outBoundRelationship[typeCode=SAS].target[classCode=SBADM, code &lt;= ExposureCode].routeCode"/>
          </mapping>
        </element>
        <element id="AllergyIntolerance.reaction.note">
          <path value="AllergyIntolerance.reaction.note"/>
          <short value="Text about event not captured in other fields"/>
          <definition
                      value="Additional text about the adverse reaction event not captured in other fields."/>
          <comment
                   value="Use this field to record information indirectly related to a particular event and not captured in the description. For example: Clinical records are no longer available, recorded based on information provided to the patient by her mother and her mother is deceased."/>
          <min value="0"/>
          <max value="*"/>
          <base>
            <path value="AllergyIntolerance.reaction.note"/>
            <min value="0"/>
            <max value="*"/>
          </base>
          <type>
            <code value="Annotation"/>
          </type>
          <constraint>
            <key value="ele-1"/>
            <severity value="error"/>
            <human value="All FHIR elements must have a @value or children"/>
            <expression
                        value="hasValue() or (children().count() &gt; id.count())"/>
            <xpath value="@value|f:*|h:div"/>
            <source value="http://hl7.org/fhir/StructureDefinition/Element"/>
          </constraint>
          <isModifier value="false"/>
          <isSummary value="false"/>
          <mapping>
            <identity value="rim"/>
            <map
                 value="subjectOf.observationEvent[code=&quot;annotation&quot;].value"/>
          </mapping>
        </element>
      </snapshot>
      <differential>
        <element id="AllergyIntolerance">
          <path value="AllergyIntolerance"/>
          <definition
                      value="The US Quality Core AllergyIntolerance Profile is based upon the US Core AllergyIntolerance Profile which is based upon the core FHIR AllergyIntolerance Resource and created to meet the 2015 Edition Common Clinical Data Set 'Medical allergies' requirements."/>
          <mustSupport value="false"/>
        </element>
        <element id="AllergyIntolerance.extension:resolutionAge">
          <path value="AllergyIntolerance.extension"/>
          <sliceName value="resolutionAge"/>
          <definition
                      value="The estimated patient age at which the allergy or intolerance resolved. Should be specified only if the status is resolved."/>
          <min value="0"/>
          <max value="1"/>
          <type>
            <code value="Extension"/>
            <profile
                     value="http://hl7.org/fhir/StructureDefinition/allergyintolerance-resolutionAge"/>
          </type>
          <mustSupport value="false"/>
        </element>
        <element id="AllergyIntolerance.type">
          <path value="AllergyIntolerance.type"/>
          <short value="allergy | intolerance - Underlying mechanism (if known)"/>
        </element>
        <element id="AllergyIntolerance.category">
          <path value="AllergyIntolerance.category"/>
          <short value="food | medication | environment | biologic"/>
        </element>
        <element id="AllergyIntolerance.criticality">
          <path value="AllergyIntolerance.criticality"/>
          <short value="low | high | unable-to-assess"/>
        </element>
        <element id="AllergyIntolerance.code">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.code"/>
          <short
                 value="(USCDI+ Quality) (USCDI) Code that identifies the allergy or intolerance"/>
        </element>
        <element id="AllergyIntolerance.patient">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.patient"/>
          <short value="(USCDI) Who the sensitivity is for"/>
          <min value="1"/>
          <max value="1"/>
          <type>
            <code value="Reference"/>
            <targetProfile
                           value="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/us-quality-core-patient"/>
          </type>
        </element>
        <element id="AllergyIntolerance.onset[x]">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.onset[x]"/>
          <short
                 value="(USCDI+ Quality) When allergy or intolerance was identified"/>
          <type>
            <code value="dateTime"/>
          </type>
          <type>
            <code value="Age"/>
          </type>
          <type>
            <code value="Period"/>
          </type>
          <type>
            <code value="Range"/>
          </type>
          <mustSupport value="false"/>
        </element>
        <element id="AllergyIntolerance.recordedDate">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.recordedDate"/>
          <short
                 value="(USCDI+ Quality) Date first version of the resource instance was recorded"/>
          <type>
            <code value="dateTime"/>
          </type>
        </element>
        <element id="AllergyIntolerance.lastOccurrence">
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.lastOccurrence"/>
          <short
                 value="(USCDI+ Quality) Date(/time) of last known occurrence of a reaction"/>
        </element>
        <element id="AllergyIntolerance.reaction">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <extension
                     url="http://fhir.org/guides/onc/us-quality-core/StructureDefinition/uscdiplusquality">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.reaction"/>
          <short
                 value="(USCDI+ Quality) (USCDI) Adverse Reaction Events linked to exposure to substance"/>
        </element>
        <element id="AllergyIntolerance.reaction.manifestation">
          <extension
                     url="http://hl7.org/fhir/us/core/StructureDefinition/uscdi-requirement">
            <valueBoolean value="true"/>
          </extension>
          <path value="AllergyIntolerance.reaction.manifestation"/>
          <short
                 value="(USCDI) Clinical symptoms/signs associated with the Event"/>
        </element>
        <element id="AllergyIntolerance.reaction.severity">
          <path value="AllergyIntolerance.reaction.severity"/>
          <short value="mild | moderate | severe (of event as a whole)"/>
        </element>
      </differential>
    </StructureDefinition>