description: This cross-version extension represents FamilyMemberHistory.condition.onset[x] from http://hl7.org/fhir/StructureDefinition/FamilyMemberHistory|1.0.2 for use in FHIR R4B.
package_name: hl7.fhir.uv.xver
derivation: constraint
name: ext_R2_FamilyMemberHistory_co_onset
type: Extension
elements:
  value:
    base: {path: 'Extension.value[x]'}
    short: When condition first manifested
    choices: [valueAge, valueRange, valuePeriod, valueString]
    index: 1
  valueAge:
    base: {path: 'Extension.value[x]'}
    type: Age
    short: When condition first manifested
    choiceOf: value
    index: 2
  valueRange:
    base: {path: 'Extension.value[x]'}
    type: Range
    short: When condition first manifested
    choiceOf: value
    index: 3
  valuePeriod:
    base: {path: 'Extension.value[x]'}
    type: Period
    short: When condition first manifested
    choiceOf: value
    index: 4
  valueString:
    base: {path: 'Extension.value[x]'}
    type: string
    short: When condition first manifested
    choiceOf: value
    index: 5
  url:
    pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-FamilyMemberHistory.condition.onset'}
    index: 6
package_version: r2.r4b-0.0.1-snapshot-1
class: extension
kind: complex-type
url: http://hl7.org/fhir/1.0/StructureDefinition/extension-FamilyMemberHistory.condition.onset
base: http://hl7.org/fhir/StructureDefinition/Extension
version: 0.0.1-snapshot-1
required: [url]