description: This cross-version extension represents MessageHeader.event[x] 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_event
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: Code for the event this message represents or link to event definition
    choices: [valueCoding, valueUri]
    index: 1
  valueCoding:
    base: {path: 'Extension.value[x]'}
    type: Coding
    short: Code for the event this message represents or link to event definition
    choiceOf: value
    index: 2
  valueUri:
    base: {path: 'Extension.value[x]'}
    type: uri
    short: Code for the event this message represents or link to event definition
    choiceOf: value
    index: 3
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/4.0/StructureDefinition/extension-MessageHeader.event'}
    index: 4
package_version: r4.r5-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/4.0/StructureDefinition/extension-MessageHeader.event
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]