<status value="draft" /> <experimental value="false" /> <date value="2025-12-12" /> <publisher value="NHS Wales" /> <contact> <name value="FHIR Service" /> <telecom> <system value="email" /> <value value="fhir.standards@wales.nhs.uk" /> <use value="work" /> <rank value="1" /> </telecom> </contact> <copyright value="2025 NHS Wales" /> <fhirVersion value="4.0.1" /> <kind value="resource" /> <abstract value="false" /> <type value="MessageHeader" /> <baseDefinition value="http://hl7.org/fhir/StructureDefinition/MessageHeader" /> <derivation value="constraint" /> <differential> <element id="MessageHeader.event[x]"> <path value="MessageHeader.event[x]" /> <type> <code value="Coding" /> </type> <binding> <strength value="preferred" /> <description value="NHS Wales Message Events" /> <valueSet value="https://fhir.nhs.wales/ValueSet/DataStandardsWales-MessageEvent" /> </binding> </element> <element id="MessageHeader.destination.target"> <path value="MessageHeader.destination.target" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Device" /> </type> </element> <element id="MessageHeader.destination.target.identifier.assigner"> <path value="MessageHeader.destination.target.identifier.assigner" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Organization" /> </type> </element> <element id="MessageHeader.destination.receiver"> <path value="MessageHeader.destination.receiver" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Practitioner" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-PractitionerRole" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Organization" /> </type> </element> <element id="MessageHeader.destination.receiver.identifier.assigner"> <path 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<type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Practitioner" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-PractitionerRole" /> </type> </element> <element id="MessageHeader.enterer.identifier.assigner"> <path value="MessageHeader.enterer.identifier.assigner" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Organization" /> </type> </element> <element id="MessageHeader.author"> <path value="MessageHeader.author" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Practitioner" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-PractitionerRole" /> </type> </element> <element id="MessageHeader.author.identifier.assigner"> <path value="MessageHeader.author.identifier.assigner" /> <type> <code 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<type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Organization" /> </type> </element> <element id="MessageHeader.focus.identifier.assigner"> <path value="MessageHeader.focus.identifier.assigner" /> <type> <code value="Reference" /> <targetProfile value="https://fhir.nhs.wales/StructureDefinition/DataStandardsWales-Organization" /> </type> </element> </differential> </StructureDefinition>