<?xml version="1.0" encoding="UTF-8"?>
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/*
  Copyright (c) 2011+, HL7, Inc.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without modification, 
  are permitted provided that the following conditions are met:
  
   * Redistributions of source code must retain the above copyright notice, this 
     list of conditions and the following disclaimer.
   * Redistributions in binary form must reproduce the above copyright notice, 
     this list of conditions and the following disclaimer in the documentation 
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   * Neither the name of HL7 nor the names of its contributors may be used to 
     endorse or promote products derived from this software without specific 
     prior written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND 
  ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 
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  IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, 
  INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 
  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
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  Generated on Tue, May 19, 2026 20:26+0000 for FHIR v6.0.0-ballot4 

  Note: the schemas &amp; schematrons do not contain all of the rules about what makes resources
  valid. Implementers will still need to be familiar with the content of the specification and with
  any profiles that apply to the resources in order to make a conformant implementation.

-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns="http://hl7.org/fhir" xmlns:xhtml="http://www.w3.org/1999/xhtml" targetNamespace="http://hl7.org/fhir" elementFormDefault="qualified" version="1.0">
  <xs:include schemaLocation="fhir-base.xsd"/>
  <xs:element name="AllergyIntolerance" type="AllergyIntolerance">
    <xs:annotation>
      <xs:documentation xml:lang="en">Risk of harmful or undesirable physiological response which is specific to an individual and associated with exposure to a substance.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="AllergyIntolerance">
    <xs:annotation>
      <xs:documentation xml:lang="en">Risk of harmful or undesirable physiological response which is specific to an individual and associated with exposure to a substance.</xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="DomainResource">
        <xs:sequence>
          <xs:element name="identifier" minOccurs="0" maxOccurs="unbounded" type="Identifier">
            <xs:annotation>
              <xs:documentation xml:lang="en">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.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="clinicalStatus" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">The clinical status of the allergy or intolerance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="verificationStatus" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Assertion about certainty associated with the propensity, or potential risk, of a reaction to the identified substance (including pharmaceutical product).  The verification status pertains to the allergy or intolerance, itself, not to any specific AllergyIntolerance attribute.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="type" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identification of the underlying physiological mechanism for the reaction risk.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="category" minOccurs="0" maxOccurs="unbounded" type="AllergyIntoleranceCategory">
            <xs:annotation>
              <xs:documentation xml:lang="en">Category of the identified substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="criticality" minOccurs="0" maxOccurs="1" type="AllergyIntoleranceCriticality">
            <xs:annotation>
              <xs:documentation xml:lang="en">Estimate of the potential clinical harm, or seriousness, of the reaction to the identified substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="code" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">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.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="patient" minOccurs="1" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The patient who has the allergy or intolerance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="encounter" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The encounter when the allergy or intolerance was asserted.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Estimated or actual date,  date-time, or age when allergy or intolerance was identified.</xs:documentation>
            </xs:annotation>
            <xs:element name="onsetDateTime" type="dateTime"/>
            <xs:element name="onsetAge" type="Age"/>
            <xs:element name="onsetPeriod" type="Period"/>
            <xs:element name="onsetRange" type="Range"/>
            <xs:element name="onsetString" type="string"/>
          </xs:choice>
          <xs:element name="recordedDate" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">The recordedDate represents when this particular AllergyIntolerance record was created in the system, which is often a system-generated date.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="recorder" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Individual who recorded the record and takes responsibility for accurately recording its content.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="asserter" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The source of the information about the allergy that is recorded.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="lastOccurrence" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">Represents the date and/or time of the last known occurrence of a reaction event.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="note" minOccurs="0" maxOccurs="unbounded" type="Annotation">
            <xs:annotation>
              <xs:documentation xml:lang="en">Additional narrative about the propensity for the Adverse Reaction, not captured in other fields.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="reaction" type="AllergyIntolerance.Reaction" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Details about each adverse reaction event linked to exposure to the identified substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="AllergyIntolerance.Reaction">
    <xs:annotation>
      <xs:documentation xml:lang="en">Risk of harmful or undesirable physiological response which is specific to an individual and associated with exposure to a substance.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="substance" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">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.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="manifestation" minOccurs="1" maxOccurs="unbounded" type="CodeableReference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Clinical symptoms and/or signs that are observed or associated with the adverse reaction event.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Text description about the reaction as a whole, including details of the manifestation if required.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="onset" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">Record of the date and/or time of the onset of the Reaction.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="severity" minOccurs="0" maxOccurs="1" type="AllergyIntoleranceSeverity">
            <xs:annotation>
              <xs:documentation xml:lang="en">Clinical assessment of the severity of the reaction event as a whole, potentially considering multiple different manifestations.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="exposureRoute" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identification of the route by which the subject was exposed to the substance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="note" minOccurs="0" maxOccurs="unbounded" type="Annotation">
            <xs:annotation>
              <xs:documentation xml:lang="en">Additional text about the adverse reaction event not captured in other fields.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="AllergyIntoleranceCriticalityEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="low">
        <xs:annotation>
          <xs:documentation xml:lang="en">Low Risk</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="high">
        <xs:annotation>
          <xs:documentation xml:lang="en">High Risk</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="unable-to-assess">
        <xs:annotation>
          <xs:documentation xml:lang="en">Unable to Assess Risk</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="AllergyIntoleranceCriticality">
    <xs:annotation>
      <xs:documentation xml:lang="en"></xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Element">
        <xs:attribute name="value" type="AllergyIntoleranceCriticalityEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="AllergyIntoleranceCategoryEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="food">
        <xs:annotation>
          <xs:documentation xml:lang="en">Food</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="medication">
        <xs:annotation>
          <xs:documentation xml:lang="en">Medication</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="environment">
        <xs:annotation>
          <xs:documentation xml:lang="en">Environment</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="biologic">
        <xs:annotation>
          <xs:documentation xml:lang="en">Biologic</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="AllergyIntoleranceCategory">
    <xs:annotation>
      <xs:documentation xml:lang="en"></xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Element">
        <xs:attribute name="value" type="AllergyIntoleranceCategoryEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="AllergyIntoleranceSeverityEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="mild">
        <xs:annotation>
          <xs:documentation xml:lang="en">Mild</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="moderate">
        <xs:annotation>
          <xs:documentation xml:lang="en">Moderate</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="severe">
        <xs:annotation>
          <xs:documentation xml:lang="en">Severe</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="AllergyIntoleranceSeverity">
    <xs:annotation>
      <xs:documentation xml:lang="en"></xs:documentation>
      <xs:documentation xml:lang="en">If the element is present, it must have either a @value, an @id, or extensions</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="Element">
        <xs:attribute name="value" type="AllergyIntoleranceSeverityEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
