<?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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  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
  

  Generated on Mon, Mar 9, 2026 22:30+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="SubscriptionTopic" type="SubscriptionTopic">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="SubscriptionTopic">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</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 subscription topic 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 subscription topic is (or will be) published. This URL can be the target of a canonical reference. It SHALL remain the same when the subscription topic 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 subscription topic by the performer and/or other systems.  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 subscription topic when it is referenced in a specification, model, design or instance. This is an arbitrary value managed by the Topic author and is not expected to be globally unique. For example, it might be a timestamp (e.g. yyyymmdd) if a managed version is not available. There is also no expectation that versions are orderable.</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 natural language name identifying the subscription topic 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 subscription topic.  For example, &quot;admission&quot;.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="derivedFrom" minOccurs="0" maxOccurs="unbounded" type="canonical">
            <xs:annotation>
              <xs:documentation xml:lang="en">The canonical URL pointing to another FHIR-defined SubscriptionTopic that is adhered to in whole or in part by this SubscriptionTopic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="status" minOccurs="1" maxOccurs="1" type="PublicationStatus">
            <xs:annotation>
              <xs:documentation xml:lang="en">The current state of the SubscriptionTopic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="experimental" minOccurs="0" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">A flag to indicate that this TopSubscriptionTopicic is authored for testing purposes (or education/evaluation/marketing), and is not intended to be used 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 subscription topic 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 subscription topic changes.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="publisher" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Helps establish the &quot;authority/credibility&quot; of the SubscriptionTopic.  May also allow for contact.</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 Topic from the 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 terms may be used to assist with indexing and searching of code system definitions.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="jurisdiction" minOccurs="0" maxOccurs="unbounded" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A jurisdiction in which the Topic is intended to be used.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="purpose" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">Explains why this Topic 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 SubscriptionTopic and/or its contents. Copyright statements are notices of intellectual property ownership and can include restrictions on the use and publishing of the SubscriptionTopic.</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="approvalDate" minOccurs="0" maxOccurs="1" type="date">
            <xs:annotation>
              <xs:documentation xml:lang="en">The date on which the asset content was approved by the publisher. Approval happens once when the content is officially approved for usage.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="lastReviewDate" minOccurs="0" maxOccurs="1" type="date">
            <xs:annotation>
              <xs:documentation xml:lang="en">The date on which the asset content was last reviewed. Review happens periodically after that, but doesn't change the original approval date.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="effectivePeriod" minOccurs="0" maxOccurs="1" type="Period">
            <xs:annotation>
              <xs:documentation xml:lang="en">The period during which the SubscriptionTopic content was or is planned to be effective.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="trigger" type="SubscriptionTopic.Trigger" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">A definition of a state change or event that triggers a notification based on the SubscriptionTopic. The criteria may be just a human readable description, or may contain a FHIRPath expression, query-based definition, or event coding. Multiple triggers are considered OR joined (e.g., an update matching ANY of the definitions will trigger a notification).</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="SubscriptionTopic.Trigger">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">The human readable description of this trigger for the SubscriptionTopic -  for example, &quot;An Encounter enters the 'in-progress' state&quot;.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="resource" minOccurs="1" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">URL of the key definition that is relevant to this trigger.  Relative URLs are relative to the StructureDefinition root of the implemented FHIR version (e.g., http://hl7.org/fhir/StructureDefinition). For example, &quot;Patient&quot; maps to http://hl7.org/fhir/StructureDefinition/Patient.  For more information, see &lt;a href=&quot;elementdefinition-definitions.html#ElementDefinition.type.code&quot;&gt;ElementDefinition.type.code&lt;/a&gt;.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="supportedInteraction" minOccurs="0" maxOccurs="unbounded" type="InteractionTrigger">
            <xs:annotation>
              <xs:documentation xml:lang="en">The FHIR RESTful interaction which can be used to trigger a notification for the SubscriptionTopic. Multiple values are considered OR joined (e.g., CREATE or UPDATE). If not present, all supported interactions are assumed.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="queryCriteria" type="SubscriptionTopic.QueryCriteria" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">The FHIR query based rules that the server should use to determine when to trigger a notification for this subscription topic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="fhirPathCriteria" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">The FHIRPath based rules that the server should use to determine when to trigger a notification for this topic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="event" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">A well-defined event which can be used to trigger notifications from the SubscriptionTopic.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="canFilterBy" type="SubscriptionTopic.CanFilterBy" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">List of properties by which Subscriptions can be filtered. May be defined Search Parameters (e.g., Encounter.patient) or parameters defined within this SubscriptionTopic context (e.g., hub.event).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="notificationShape" type="SubscriptionTopic.NotificationShape" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">List of properties to describe the shape (e.g., resources) included in notifications from this trigger.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="SubscriptionTopic.QueryCriteria">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="previous" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">The FHIR query based rules are applied to the previous resource state (e.g., state before an update).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="resultForCreate" minOccurs="0" maxOccurs="1" type="CriteriaNotExistsBehavior">
            <xs:annotation>
              <xs:documentation xml:lang="en">For `create` interactions, should the `previous` criteria count as an automatic pass or an automatic fail. If not present, the testing behavior during `create` interactions is unspecified (server discretion).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="current" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">The FHIR query based rules are applied to the current resource state (e.g., state after an update).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="resultForDelete" minOccurs="0" maxOccurs="1" type="CriteriaNotExistsBehavior">
            <xs:annotation>
              <xs:documentation xml:lang="en">For 'delete' interactions, should the 'current' query criteria count as an automatic pass or an automatic fail. If not present, the testing behavior during `delete` interactions is unspecified (server discretion).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="requireBoth" minOccurs="0" maxOccurs="1" type="boolean">
            <xs:annotation>
              <xs:documentation xml:lang="en">If set to `true`, both the `current` and `previous` query criteria must evaluate `true` to trigger a notification for this topic.  If set to `false` or not present, a notification for this topic will be triggered if either the `current` or `previous` tests evaluate to `true`.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="SubscriptionTopic.CanFilterBy">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="description" minOccurs="0" maxOccurs="1" type="markdown">
            <xs:annotation>
              <xs:documentation xml:lang="en">Description of how this filtering parameter is intended to be used.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="resource" minOccurs="0" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">URL of the Resource that is the type used in this filter. This is the &quot;focus&quot; of the topic (or one of them if there are more than one). It will be the same, a generality, or a specificity of the `SubscriptionTopic.trigger.resource` if this is present.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="filterParameter" minOccurs="1" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Either the canonical URL to a search parameter (like &quot;http://hl7.org/fhir/SearchParameter/encounter-patient&quot;) or topic-defined parameter (like &quot;hub.event&quot;) which is a label for the filter.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="filterDefinition" minOccurs="0" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">Either the canonical URL to a search parameter (like &quot;http://hl7.org/fhir/SearchParameter/encounter-patient&quot;) or the officially-defined URI for a shared filter concept (like &quot;http://example.org/concepts/shared-common-event&quot;).</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="comparator" minOccurs="0" maxOccurs="unbounded" type="SearchComparator">
            <xs:annotation>
              <xs:documentation xml:lang="en">Comparators allowed for the filter parameter.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="modifier" minOccurs="0" maxOccurs="unbounded" type="SearchModifierCode">
            <xs:annotation>
              <xs:documentation xml:lang="en">Modifiers allowed for the filter parameter.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="SubscriptionTopic.NotificationShape">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="resource" minOccurs="1" maxOccurs="1" type="uri">
            <xs:annotation>
              <xs:documentation xml:lang="en">URL of the Data Type, Resource, or definition (e.g., logical model) that is the type used in this shape. This is the 'focus' resource of the topic (or one of them if there are more than one) and the root for this shape definition. It will be the same, a generality, or a specificity of `SubscriptionTopic.trigger.resource` when it is present.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="include" minOccurs="0" maxOccurs="unbounded" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Search-style _include directives, rooted in the resource for this shape. Servers SHOULD include resources listed here, if they exist and the user is authorized to receive them.  Clients SHOULD be prepared to receive these additional resources, but SHALL function properly without them.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="revInclude" minOccurs="0" maxOccurs="unbounded" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Search-style _revinclude directives, rooted in the resource for this shape. Servers SHOULD include resources listed here, if they exist and the user is authorized to receive them.  Clients SHOULD be prepared to receive these additional resources, but SHALL function properly without them.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="relatedQuery" type="SubscriptionTopic.RelatedQuery" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">Queries and codes that could be included with notifications of this shape. Servers MAY include these queries if supported and desired in the workflow.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="SubscriptionTopic.RelatedQuery">
    <xs:annotation>
      <xs:documentation xml:lang="en">Describes a stream of resource state changes or events and annotated with labels useful to filter projections from this topic.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="queryType" minOccurs="0" maxOccurs="1" type="Coding">
            <xs:annotation>
              <xs:documentation xml:lang="en">Coded value(s) used to describe the type of information that evaluating this query will provide. Subscribers can use the values to ensure the data they request are relevant and necessary for their use.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="query" minOccurs="1" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Query a subscriber can use to retrieve additional information. The exact contents of the query MAY depend on the value of the `queryType`, however this SHOULD be a query suitable for use as an HTTP GET request (either fully-qualified or partial).</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="InteractionTriggerEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="create">
        <xs:annotation>
          <xs:documentation xml:lang="en">create</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="update">
        <xs:annotation>
          <xs:documentation xml:lang="en">update</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="delete">
        <xs:annotation>
          <xs:documentation xml:lang="en">delete</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="InteractionTrigger">
    <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="InteractionTriggerEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="CriteriaNotExistsBehaviorEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="test-passes">
        <xs:annotation>
          <xs:documentation xml:lang="en">Test passes</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="test-fails">
        <xs:annotation>
          <xs:documentation xml:lang="en">Test fails</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="CriteriaNotExistsBehavior">
    <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="CriteriaNotExistsBehaviorEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
