<status value="draft" /> <experimental value="false" /> <date value="2026-05-14" /> <publisher value="Longitudinal Record Access (LRA)" /> <description value="MessageHeader used to identify the Health Gateway notification request event and reference the notification CommunicationRequest." /> <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"> <path value="MessageHeader" /> </element> <element id="MessageHeader.event[x]"> <path value="MessageHeader.event[x]" /> <short value="Notification request event" /> <min value="1" /> <max value="1" /> <type> <code value="Coding" /> </type> <patternCoding> <system value="http://phsa.ca/fhir/CodeSystem/notification-events" /> <code value="notification-request" /> </patternCoding> <mustSupport value="true" /> </element> <element id="MessageHeader.destination"> <path value="MessageHeader.destination" /> <min value="1" /> <max value="1" /> <mustSupport value="true" /> </element> <element id="MessageHeader.destination.endpoint"> <path value="MessageHeader.destination.endpoint" /> <short value="LRA notification $process-message endpoint" /> <min value="1" /> <max value="1" /> <mustSupport value="true" /> </element> <element id="MessageHeader.source"> <path value="MessageHeader.source" /> <min value="1" /> <max value="1" /> <mustSupport value="true" /> </element> <element id="MessageHeader.source.name"> <path value="MessageHeader.source.name" /> <short value="Source system code" /> <min value="1" /> <max value="1" /> <fixedString value="HGW" /> <mustSupport value="true" /> </element> <element id="MessageHeader.source.endpoint"> <path value="MessageHeader.source.endpoint" /> <min value="1" /> <max value="1" /> <fixedUrl value="https://www.healthgateway.gov.bc.ca/" /> <mustSupport value="true" /> </element> <element id="MessageHeader.focus"> <path value="MessageHeader.focus" /> <short value="Reference to the notification CommunicationRequest" /> <min value="1" /> <max value="1" /> <type> <code value="Reference" /> <targetProfile value="http://phsa.ca/fhir/StructureDefinition/lra-notification-communicationrequest" /> </type> <mustSupport value="true" /> </element> </differential> </StructureDefinition>