<?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 
     and/or other materials provided with the distribution.
   * 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 
  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 
  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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  POSSIBILITY OF SUCH DAMAGE.
  

  Generated on Mon, Mar 30, 2026 16:23+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="StructureDefinition" type="StructureDefinition">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="StructureDefinition">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</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="CanonicalResource">
        <xs:sequence>
          <xs:element name="url" minOccurs="1" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">An absolute URI that is used to identify this structure definition when it is referenced in a specification, model, design or an instance; also called its canonical identifier. This SHOULD be globally unique and SHOULD be a literal address at which an authoritative instance of this structure definition is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the structure definition is stored on different servers.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="identifier" minOccurs="0" maxOccurs="unbounded" type="Identifier">
            <xs:annotation>
              <xs:documentation xml:lang="en">A formal identifier that is used to identify this structure definition when it is represented in other formats, or referenced in a specification, model, design or an instance.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="version" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">The identifier that is used to identify this version of the structure definition when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the structure definition author and is not expected to be globally unique. There is no expectation that versions can be placed in a lexicographical sequence, so authors are encouraged to populate the StructureDefinition.versionAlgorithm[x] element to enable comparisons. If there is no managed version available, authors can consider using ISO date/time syntax (e.g., '2023-01-01').</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates the mechanism used to compare versions to determine which is more current.</xs:documentation>
            </xs:annotation>
            <xs:element name="versionAlgorithmString" type="string"/>
            <xs:element name="versionAlgorithmCoding" type="Coding"/>
          </xs:choice>
          <xs:element name="name" minOccurs="1" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A natural language name identifying the structure definition. This name should be usable as an identifier for the module by machine processing applications such as code generation.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="title" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A short, descriptive, user-friendly title for the structure definition.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="status" minOccurs="1" maxOccurs="1" type="PublicationStatus">
            <xs:annotation>
              <xs:documentation xml:lang="en">The status of this structure definition. Enables tracking the life-cycle of the content.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="experimental" minOccurs="0" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">A Boolean value to indicate that this structure definition is authored for testing purposes (or education/evaluation/marketing) and no version of this resource will ever be intended for genuine usage.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="date" minOccurs="0" maxOccurs="1" type="dateTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">The date  (and optionally time) when the structure definition was last significantly changed. The date must change when the business version changes and it must change if the status code changes. In addition, it should change when the substantive content of the structure definition changes.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="publisher" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">The name of the organization or individual responsible for the release and ongoing maintenance of the structure definition.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="contact" minOccurs="0" maxOccurs="unbounded" type="ContactDetail">
            <xs:annotation>
              <xs:documentation xml:lang="en">Contact details to assist a user in finding and communicating with the publisher.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">A free text natural language description of the structure definition from a consumer's perspective.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="useContext" minOccurs="0" maxOccurs="unbounded" type="UsageContext">
            <xs:annotation>
              <xs:documentation xml:lang="en">The content was developed with a focus and intent of supporting the contexts that are listed. These contexts may be general categories (gender, age, ...) or may be references to specific programs (insurance plans, studies, ...) and may be used to assist with indexing and searching for appropriate structure definition instances.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="jurisdiction" minOccurs="0" maxOccurs="unbounded" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A legal or geographic region in which the authority that maintains the resource is operating.  In general, the jurisdiction is also found in the useContext.  The useContext may reference additional jurisdictions because the defining jurisdiction does not necessarily limit the jurisdictions of use.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="purpose" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">Explanation of why this structure definition is needed and why it has been designed as it has.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="copyright" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">A copyright statement relating to the structure definition and/or its contents. Copyright statements are notices of intellectual property ownership and can include restrictions on the use and publishing of the structure definition.  The short copyright declaration (e.g. (c) '2015+ xyz organization') should be sent in the copyrightLabel element without the copyright prefix (i.e., do not include '(c)' or the symbol).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="copyrightLabel" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A short string (&lt;50 characters), suitable for inclusion in a page footer that identifies the copyright holder, effective period, and optionally whether rights are restricted. (e.g. 'All rights reserved', 'Some rights reserved').</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="keyword" minOccurs="0" maxOccurs="unbounded" type="Coding">
            <xs:annotation>
              <xs:documentation xml:lang="en">(DEPRECATED) A set of key words or terms from external terminologies that may be used to assist with indexing and searching of templates by describing the use of this structure definition, or the content it describes.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="fhirVersion" minOccurs="0" maxOccurs="1" type="FHIRVersion">
            <xs:annotation>
              <xs:documentation xml:lang="en">The version of the FHIR specification on which this StructureDefinition is based - this is the formal version of the specification, without the revision number, e.g. [publication].[major].[minor], which is 4.6.0. for this version.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="mapping" type="StructureDefinition.Mapping" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">An external specification that the content is mapped to.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="kind" minOccurs="1" maxOccurs="1" type="StructureDefinitionKind">
            <xs:annotation>
              <xs:documentation xml:lang="en">Defines the kind of structure that this definition is describing.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="abstract" minOccurs="1" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">Whether structure this definition describes is abstract or not  - that is, whether the structure is not intended to be instantiated. For Resources and Data types, abstract types will never be exchanged  between systems.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="context" type="StructureDefinition.Context" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the types of resource or data type elements to which the extension can be applied. For more guidance on using the 'context' element, see the [defining extensions page](defining-extensions.html#context).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="contextInvariant" minOccurs="0" maxOccurs="unbounded" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A set of rules as FHIRPath Invariants about when the extension can be used (e.g. co-occurrence variants for the extension). All the rules must be true.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="type" minOccurs="1" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">The type this structure describes. If the derivation kind is 'specialization' then this is the master definition for a type, and there is always one of these (a data type, an extension, a resource, including abstract ones). Otherwise the structure definition is a constraint on the stated type (and in this case, the type cannot be an abstract type).  References are URLs that are relative to http://hl7.org/fhir/StructureDefinition e.g. &quot;string&quot; is a reference to http://hl7.org/fhir/StructureDefinition/string. Absolute URLs are only allowed in logical models, where they are required.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="baseDefinition" minOccurs="0" maxOccurs="1" type="canonical">
            <xs:annotation>
              <xs:documentation xml:lang="en">An absolute URI that is the base structure from which this type is derived, either by specialization or constraint.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="derivation" minOccurs="0" maxOccurs="1" type="TypeDerivationRule">
            <xs:annotation>
              <xs:documentation xml:lang="en">How the type relates to the baseDefinition.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="snapshot" type="StructureDefinition.Snapshot" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">A snapshot view is expressed in a standalone form that can be used and interpreted without considering the base StructureDefinition.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="differential" type="StructureDefinition.Differential" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">A differential view is expressed relative to the base StructureDefinition - a statement of differences that it applies.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="StructureDefinition.Mapping">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="identity" minOccurs="1" maxOccurs="1" type="id">
            <xs:annotation>
              <xs:documentation xml:lang="en">An Internal id that is used to identify this mapping set when specific mappings are made.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="uri" minOccurs="0" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">An absolute URI that identifies the specification that this mapping is expressed to.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="name" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A name for the specification that is being mapped to.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="comment" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Comments about this mapping, including version notes, issues, scope limitations, and other important notes for usage.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="StructureDefinition.Context">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="type" minOccurs="1" maxOccurs="1" type="ExtensionContextType">
            <xs:annotation>
              <xs:documentation xml:lang="en">Defines how to interpret the expression that defines what the context of the extension is.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="expression" minOccurs="1" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">An expression that defines where an extension can be used in resources.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="StructureDefinition.Snapshot">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="element" minOccurs="1" maxOccurs="unbounded" type="ElementDefinition">
            <xs:annotation>
              <xs:documentation xml:lang="en">Captures constraints on each element within the resource.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="StructureDefinition.Differential">
    <xs:annotation>
      <xs:documentation xml:lang="en">A definition of a FHIR structure. This resource is used to describe the underlying resources, data types defined in FHIR, and also for describing extensions and constraints on resources and data types.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="element" minOccurs="1" maxOccurs="unbounded" type="ElementDefinition">
            <xs:annotation>
              <xs:documentation xml:lang="en">Captures constraints on each element within the resource.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="StructureDefinitionKindEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="primitive-type">
        <xs:annotation>
          <xs:documentation xml:lang="en">Primitive Data Type</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="complex-type">
        <xs:annotation>
          <xs:documentation xml:lang="en">Complex Data Type</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="resource">
        <xs:annotation>
          <xs:documentation xml:lang="en">Resource</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="logical">
        <xs:annotation>
          <xs:documentation xml:lang="en">Logical</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="StructureDefinitionKind">
    <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="StructureDefinitionKindEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="TypeDerivationRuleEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="specialization">
        <xs:annotation>
          <xs:documentation xml:lang="en">Specialization</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="constraint">
        <xs:annotation>
          <xs:documentation xml:lang="en">Constraint</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="TypeDerivationRule">
    <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="TypeDerivationRuleEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="ExtensionContextTypeEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="fhirpath">
        <xs:annotation>
          <xs:documentation xml:lang="en">FHIRPath</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="element">
        <xs:annotation>
          <xs:documentation xml:lang="en">Element ID</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="extension">
        <xs:annotation>
          <xs:documentation xml:lang="en">Extension URL</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="ExtensionContextType">
    <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="ExtensionContextTypeEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
