description: This cross-version extension represents Account.activePeriod from http://hl7.org/fhir/StructureDefinition/Account|1.0.2 for use in FHIR R4. package_name: hl7.fhir.uv.xver-r2.r4 derivation: constraint name: ext_R2_Account_activePeriod type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Valid from..to choices: [valuePeriod] index: 1 valuePeriod: base: {path: 'Extension.value[x]'} type: Period short: Valid from..to choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-Account.activePeriod'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-Account.activePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]