<?xml version="1.0" encoding="UTF-8"?>
<!-- 
 * #%L
 * org.hl7.fhir.r5
 * %%
 * Copyright (C) 2014 - 2019 Health Level 7
 * %%
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * #L%
 */

/*
  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 
  PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 
  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
  ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
  POSSIBILITY OF SUCH DAMAGE.
  

  Generated on Tue, Jun 16, 2026 19:54+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="MessageHeader" type="MessageHeader">
    <xs:annotation>
      <xs:documentation xml:lang="en">The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.</xs:documentation>
    </xs:annotation>
  </xs:element>
  <xs:complexType name="MessageHeader">
    <xs:annotation>
      <xs:documentation xml:lang="en">The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.</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:choice minOccurs="1" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Code that identifies the event this message represents and connects it with its definition. Events are defined by codes, or by URIs that identify events, or by reference to EventDefinition or SubscriptionTopic resources that define the event directly. This element is intentionally unbound, and the selection of appropriate event codes is delegated to implementations and implementation guides. For codes, a good set of example codes is found in [the V2 event codes](https://terminology.hl7.org/ValueSet-v2-0003.html).</xs:documentation>
            </xs:annotation>
            <xs:element name="eventCoding" type="Coding"/>
            <xs:element name="eventUri" type="uri"/>
            <xs:element name="eventCanonical" type="canonical"/>
          </xs:choice>
          <xs:element name="destination" type="MessageHeader.Destination" minOccurs="0" maxOccurs="unbounded">
            <xs:annotation>
              <xs:documentation xml:lang="en">The destination application which the message is intended for.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="source" type="MessageHeader.Source" minOccurs="1" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">The source application from which this message originated.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="reason" minOccurs="0" maxOccurs="1" type="CodeableConcept">
            <xs:annotation>
              <xs:documentation xml:lang="en">Coded indication of the cause for the event - indicates  a reason for the occurrence of the event that is a focus of this message.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="response" type="MessageHeader.Response" minOccurs="0" maxOccurs="1">
            <xs:annotation>
              <xs:documentation xml:lang="en">Information about the message that this message is a response to.  Only present if this message is a response.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="focus" minOccurs="0" maxOccurs="unbounded" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">The actual data of the message - a reference to the root/focus class of the event. This is allowed to be a Parameters resource.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="definition" minOccurs="0" maxOccurs="1" type="canonical">
            <xs:annotation>
              <xs:documentation xml:lang="en">Permanent link to the MessageDefinition for this message.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="MessageHeader.Destination">
    <xs:annotation>
      <xs:documentation xml:lang="en">The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Indicates where the message should be routed.</xs:documentation>
            </xs:annotation>
            <xs:element name="endpointUrl" type="url"/>
            <xs:element name="endpointReference" type="Reference"/>
          </xs:choice>
          <xs:element name="name" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Human-readable name for the target system.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="receiver" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Allows data conveyed by a message to be addressed to a particular person or department when routing to a specific application isn't sufficient.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="MessageHeader.Source">
    <xs:annotation>
      <xs:documentation xml:lang="en">The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:choice minOccurs="0" maxOccurs="1" >
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the routing target to send acknowledgements to.</xs:documentation>
            </xs:annotation>
            <xs:element name="endpointUrl" type="url"/>
            <xs:element name="endpointReference" type="Reference"/>
          </xs:choice>
          <xs:element name="name" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Human-readable name for the source system.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="software" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">May include configuration or other information useful in debugging.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="version" minOccurs="0" maxOccurs="1" type="string">
            <xs:annotation>
              <xs:documentation xml:lang="en">Can convey versions of multiple systems in situations where a message passes through multiple hands.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="contact" minOccurs="0" maxOccurs="1" type="ContactPoint">
            <xs:annotation>
              <xs:documentation xml:lang="en">An e-mail, phone, website or other contact point to use to resolve issues with message communications.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="sender" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Identifies the sending entity to allow the use of a trust relationship.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:complexType name="MessageHeader.Response">
    <xs:annotation>
      <xs:documentation xml:lang="en">The header for a message exchange that is either requesting or responding to an action.  The reference(s) that are the subject of the action as well as other information related to the action are typically transmitted in a bundle in which the MessageHeader resource instance is the first resource in the bundle.</xs:documentation>
    </xs:annotation>
    <xs:complexContent>
      <xs:extension base="BackboneElement">
        <xs:sequence>
          <xs:element name="identifier" minOccurs="1" maxOccurs="1" type="Identifier">
            <xs:annotation>
              <xs:documentation xml:lang="en">The Bundle.identifier of the message to which this message is a response.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="code" minOccurs="1" maxOccurs="1" type="ResponseType">
            <xs:annotation>
              <xs:documentation xml:lang="en">Code that identifies the type of response to the message - whether it was successful or not, and whether it should be resent or not.</xs:documentation>
           </xs:annotation>
          </xs:element>
          <xs:element name="details" minOccurs="0" maxOccurs="1" type="Reference">
            <xs:annotation>
              <xs:documentation xml:lang="en">Full details of any issues found in the message.</xs:documentation>
           </xs:annotation>
          </xs:element>
        </xs:sequence>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
  <xs:simpleType name="ResponseTypeEnum">
    <xs:restriction base="code-primitive">
      <xs:enumeration value="ok">
        <xs:annotation>
          <xs:documentation xml:lang="en">OK</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="transient-error">
        <xs:annotation>
          <xs:documentation xml:lang="en">Transient Error</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
      <xs:enumeration value="fatal-error">
        <xs:annotation>
          <xs:documentation xml:lang="en">Fatal Error</xs:documentation>
        </xs:annotation>
      </xs:enumeration>
    </xs:restriction>
  </xs:simpleType>
  <xs:complexType name="ResponseType">
    <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="ResponseTypeEnum" use="optional"/>
      </xs:extension>
    </xs:complexContent>
  </xs:complexType>
</xs:schema>
