<Appointment xmlns="http://hl7.org/fhir">
  <id value="284242" />
  <meta>
    <profile value="https://fhir.cambio.se/StructureDefinition/AppointmentCancellationSe/v1" />
  </meta>
  <extension url="https://fhir.cambio.se/StructureDefinition/appointment-message">
    <valueString value="Operation bokad." />
  </extension>
</Appointment>