description: This cross-version extension represents MessageHeader.response.identifier from http://hl7.org/fhir/StructureDefinition/MessageHeader|4.0.1 for use in FHIR R5.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: ext_R4_MessageHeader_re_identifier
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: Id of original message
    choices: [valueId]
    index: 1
  valueId:
    base: {path: 'Extension.value[x]'}
    type: id
    short: Id of original message
    choiceOf: value
    index: 2
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-MessageHeader.response.identifier'}
    index: 3
package_version: r4.r5-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-MessageHeader.response.identifier
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]