description: This cross-version extension represents FamilyMemberHistory.age[x] from http://hl7.org/fhir/StructureDefinition/FamilyMemberHistory|1.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r2.r4b derivation: constraint name: Ext_R2_FamilyMemberHistory_age type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-FamilyMemberHistory.age'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: (approximate) age choices: [valueAge, valueRange, valueString] index: 2 valueAge: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Age short: (approximate) age choiceOf: value index: 3 valueRange: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Range short: (approximate) age choiceOf: value index: 4 valueString: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: string short: (approximate) age choiceOf: value index: 5 package_version: 0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-FamilyMemberHistory.age base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url]