<?xml version="1.0" encoding="UTF-8"?>
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 * Copyright (C) 2014 - 2019 Health Level 7
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 * you may not use this file except in compliance with the License.
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 * distributed under the License is distributed on an "AS IS" BASIS,
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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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  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="Group" type="Group">
    <xs:annotation>
      <xs:documentation xml:lang="en">Represents a defined collection of entities that may be discussed or acted upon collectively but which are not typically expected to act collectively.  These collections are also not typically formally or legally recognized.

NOTE: Group may be used to define families or households, which in some circumstances may act collectively or have a degree of legal or formal recognition.  This should be considered an exception.  When Group is used for types of entities other than Patient or RelatedPerson, the expectation remains that the Group will not act collectively or have formal recognition - use Organization if these behaviors are needed.

For example, it is possible for a 'family' Group to be a performer of an Observation or owner of a Task.  However, this is not permitted for a Group made up of Practitioners, PractitionerRoles or Organizations.  Organization or CareTeam would need to be used instead.  A Group of Practitioners could, however, be a subject of an Observation.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="Group">
    <xs:annotation>
      <xs:documentation xml:lang="en">Represents a defined collection of entities that may be discussed or acted upon collectively but which are not typically expected to act collectively.  These collections are also not typically formally or legally recognized.

NOTE: Group may be used to define families or households, which in some circumstances may act collectively or have a degree of legal or formal recognition.  This should be considered an exception.  When Group is used for types of entities other than Patient or RelatedPerson, the expectation remains that the Group will not act collectively or have formal recognition - use Organization if these behaviors are needed.

For example, it is possible for a 'family' Group to be a performer of an Observation or owner of a Task.  However, this is not permitted for a Group made up of Practitioners, PractitionerRoles or Organizations.  Organization or CareTeam would need to be used instead.  A Group of Practitioners could, however, be a subject of an Observation.</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="0" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">An absolute URI that is used to identify this Group 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 Group is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the Group 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">Business identifiers assigned to this participant by one of the applications involved.  These identifiers remain constant as the resource is updated and propagates from server to server.</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 Group when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the Group author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions can be placed in a lexicographical sequence without additional knowledge.</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="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">A label assigned to the group for human identification and communication.</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 Group.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="status" minOccurs="0" maxOccurs="1" type="PublicationStatus">
            <xs:annotation>
              <xs:documentation xml:lang="en">The current state of this Group.</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 Group 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 Group 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 Group 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 Group.</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">Explanation of what the group represents and how it is intended to be used.</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 Groups.</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 Group 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 Group and/or its contents. Copyright statements are notices of intellectual property ownership and can include restrictions on the use and publishing of the Group.</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="type" minOccurs="0" maxOccurs="1" type="GroupType">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the broad classification of the kind of resources the group includes.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="membership" minOccurs="1" maxOccurs="1" type="GroupMembershipBasis">
            <xs:annotation>
              <xs:documentation xml:lang="en">Basis for membership in the Group:

* 'definitional': The Group.characteristics specified are both necessary and sufficient to determine membership. All entities that meet the criteria are considered to be members of the group, whether referenced by the group or not. If members are present, they are individuals that happen to be known as meeting the Group.characteristics. The list cannot be presumed to be complete.
* 'conceptual': The Group.characteristics specified are both necessary and sufficient to determine membership. The 'conceptual' Group is a 'definitional' Group in which the Group.type is not bound to FHIR types.
* 'enumerated': The Group.characteristics are necessary but not sufficient to determine membership. Membership is determined by being listed as one of the Group.member.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="code" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code that describes the use of the group. The use of the group usually dictates what kind of entities can be members of the group.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="quantity" minOccurs="0" maxOccurs="1" type="unsignedInt">
            <xs:annotation>
              <xs:documentation xml:lang="en">A count of the number of resource instances that are part of the group.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="managingEntity" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Entity responsible for defining and maintaining Group characteristics and/or registered members.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="combinationMethod" minOccurs="0" maxOccurs="1" type="GroupCharacteristicCombination">
            <xs:annotation>
              <xs:documentation xml:lang="en">Used to specify how two or more characteristics are combined.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="combinationThreshold" minOccurs="0" maxOccurs="1" type="positiveInt">
            <xs:annotation>
              <xs:documentation xml:lang="en">Provides the value of &quot;n&quot; when &quot;at-least&quot; or &quot;at-most&quot; codes are used for combinationMethod.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="characteristic" type="Group.Characteristic" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies traits whose presence r absence is shared by members of the group.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="member" type="Group.Member" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the resource instances that are members of the group.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Group.Characteristic">
    <xs:annotation>
      <xs:documentation xml:lang="en">Represents a defined collection of entities that may be discussed or acted upon collectively but which are not typically expected to act collectively.  These collections are also not typically formally or legally recognized.

NOTE: Group may be used to define families or households, which in some circumstances may act collectively or have a degree of legal or formal recognition.  This should be considered an exception.  When Group is used for types of entities other than Patient or RelatedPerson, the expectation remains that the Group will not act collectively or have formal recognition - use Organization if these behaviors are needed.

For example, it is possible for a 'family' Group to be a performer of an Observation or owner of a Task.  However, this is not permitted for a Group made up of Practitioners, PractitionerRoles or Organizations.  Organization or CareTeam would need to be used instead.  A Group of Practitioners could, however, be a subject of an Observation.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="code" minOccurs="1" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code that identifies the kind of trait being asserted.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="1" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">The value of the trait that holds (or does not hold - see 'exclude') for members of the group.</xs:documentation>
            </xs:annotation>
            <xs:element name="valueCodeableConcept" type="CodeableConcept"/>
            <xs:element name="valueBoolean" type="boolean"/>
            <xs:element name="valueQuantity" type="Quantity"/>
            <xs:element name="valueRange" type="Range"/>
            <xs:element name="valueReference" type="Reference"/>
            <xs:element name="valueUri" type="uri"/>
            <xs:element name="valueExpression" type="Expression"/>
          </xs:choice>
          <xs:element name="exclude" minOccurs="1" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">If true, indicates the characteristic is one that is NOT held by members of the group.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">A short, natural language description of the characteristic that could be used to communicate the criteria to an end-user.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="method" minOccurs="0" maxOccurs="unbounded" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Method for how the characteristic value was determined.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="formula" minOccurs="0" maxOccurs="1" type="Expression">
            <xs:annotation>
              <xs:documentation xml:lang="en">A CQL, FHIRPath, or other expression that is used to generate the value for this characteristic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="determiner" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The entity who is expected to evaluate the characteristic value for candidate group members.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="offset" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Defines the reference point for comparison when other than 0.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Number of occurrences meeting the characteristic.</xs:documentation>
            </xs:annotation>
            <xs:element name="instancesUnsignedInt" type="unsignedInt"/>
            <xs:element name="instancesRange" type="Range"/>
          </xs:choice>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Length of time in which the characteristic is met.</xs:documentation>
            </xs:annotation>
            <xs:element name="durationDuration" type="Duration"/>
            <xs:element name="durationRange" type="Range"/>
          </xs:choice>
          <xs:element name="period" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">The period over which the characteristic is tested; e.g. the patient had an operation during the month of June.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="timing" minOccurs="0" maxOccurs="unbounded" type="RelativeTime">
            <xs:annotation>
              <xs:documentation xml:lang="en">Timing in which the characteristic is determined.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="Group.Member">
    <xs:annotation>
      <xs:documentation xml:lang="en">Represents a defined collection of entities that may be discussed or acted upon collectively but which are not typically expected to act collectively.  These collections are also not typically formally or legally recognized.

NOTE: Group may be used to define families or households, which in some circumstances may act collectively or have a degree of legal or formal recognition.  This should be considered an exception.  When Group is used for types of entities other than Patient or RelatedPerson, the expectation remains that the Group will not act collectively or have formal recognition - use Organization if these behaviors are needed.

For example, it is possible for a 'family' Group to be a performer of an Observation or owner of a Task.  However, this is not permitted for a Group made up of Practitioners, PractitionerRoles or Organizations.  Organization or CareTeam would need to be used instead.  A Group of Practitioners could, however, be a subject of an Observation.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="entity" minOccurs="1" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">A reference to the entity that is a member of the group. Must be consistent with Group.type. If the entity is another group, then the type must be the same.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="involvement" minOccurs="0" maxOccurs="unbounded" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A code that describes how a user is involved in the group. Some groups (e.g. exposure-group) typically don't have variance between members, or it is not tracked, while for other groups (e.g. family, household) this may be meaningful.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="period" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">The period that the member was in the group, if known.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="inactive" minOccurs="0" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">A flag to indicate that the member is no longer in the group, but previously may have been a member.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="GroupTypeEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="person">
        <xs:annotation>
          <xs:documentation xml:lang="en">Person</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="animal">
        <xs:annotation>
          <xs:documentation xml:lang="en">Animal</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="practitioner">
        <xs:annotation>
          <xs:documentation xml:lang="en">Practitioner</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="device">
        <xs:annotation>
          <xs:documentation xml:lang="en">Device</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="careteam">
        <xs:annotation>
          <xs:documentation xml:lang="en">CareTeam</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="healthcareservice">
        <xs:annotation>
          <xs:documentation xml:lang="en">HealthcareService</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="location">
        <xs:annotation>
          <xs:documentation xml:lang="en">Location</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="organization">
        <xs:annotation>
          <xs:documentation xml:lang="en">Organization</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="relatedperson">
        <xs:annotation>
          <xs:documentation xml:lang="en">RelatedPerson</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="specimen">
        <xs:annotation>
          <xs:documentation xml:lang="en">Specimen</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="medicinalproductdefinition">
        <xs:annotation>
          <xs:documentation xml:lang="en">MedicinalProductDefinition</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="substance">
        <xs:annotation>
          <xs:documentation xml:lang="en">Substance</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="substancedefinition">
        <xs:annotation>
          <xs:documentation xml:lang="en">SubstanceDefinition</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="biologicallyDerivedProduct">
        <xs:annotation>
          <xs:documentation xml:lang="en">BiologicallyDerivedProduct</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="nutritionProduct">
        <xs:annotation>
          <xs:documentation xml:lang="en">NutritionProduct</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="GroupType">
    <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="GroupTypeEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="GroupMembershipBasisEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="definitional">
        <xs:annotation>
          <xs:documentation xml:lang="en">Definitional</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="conceptual">
        <xs:annotation>
          <xs:documentation xml:lang="en">Conceptual</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="enumerated">
        <xs:annotation>
          <xs:documentation xml:lang="en">Enumerated</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="GroupMembershipBasis">
    <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="GroupMembershipBasisEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="GroupCharacteristicCombinationEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="all-of">
        <xs:annotation>
          <xs:documentation xml:lang="en">All of</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="any-of">
        <xs:annotation>
          <xs:documentation xml:lang="en">Any of</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="at-least">
        <xs:annotation>
          <xs:documentation xml:lang="en">At least</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="at-most">
        <xs:annotation>
          <xs:documentation xml:lang="en">At most</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="except-subset">
        <xs:annotation>
          <xs:documentation xml:lang="en">Except subset</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="GroupCharacteristicCombination">
    <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="GroupCharacteristicCombinationEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
