<?xml version="1.0" encoding="UTF-8"?>
<difference>
   <type name="MessageHeader" status="changed">
      <element path="MessageHeader.event[x]">
         <added-type name="canonical(EventDefinition | SubscriptionTopic)"/>
      </element>
      <element new-min="0"
               old-min="1"
               old-name="endpoint"
               path="MessageHeader.destination.endpoint[x]">
         <added-type name="Reference(Endpoint)"/>
      </element>
      <element path="MessageHeader.destination.receiver">
         <removed-type name="Reference(Practitioner | PractitionerRole | Organization)"/>
         <added-type name="Reference(Device | Organization | Patient | Practitioner | PractitionerRole | RelatedPerson)"/>
      </element>
      <element new-min="0"
               old-min="1"
               old-name="endpoint"
               path="MessageHeader.source.endpoint[x]">
         <added-type name="Reference(Endpoint)"/>
      </element>
      <element path="MessageHeader.source.sender">
         <removed-type name="Reference(Practitioner | PractitionerRole | Organization)"/>
         <added-type name="Reference(Device | Organization | Patient | Practitioner | PractitionerRole)"/>
      </element>
      <element path="MessageHeader.response.identifier">
         <removed-type name="id"/>
         <added-type name="Identifier"/>
      </element>
      <element binding-status="changed"
               binding-valueset-changed="true"
               path="MessageHeader.response.code">
         <old-binding reference="http://hl7.org/fhir/ValueSet/response-code|4.0.0"
                      strength="required"/>
         <new-binding reference="http://hl7.org/fhir/ValueSet/response-code|6.0.0-ballot4"
                      strength="required"/>
      </element>
      <element path="MessageHeader.destination.target" status="deleted"/>
      <element path="MessageHeader.enterer" status="deleted"/>
      <element path="MessageHeader.author" status="deleted"/>
      <element path="MessageHeader.responsible" status="deleted"/>
   </type>
</difference>
