description: null package_name: vzvz.fhir.nl derivation: constraint name: ExtPatientBirthDate type: Extension elements: url: pattern: {type: Uri, value: 'http://fhir.nl/StructureDefinition/Patient.birthDate'} index: 0 value: choices: [valueDate] index: 2 valueDate: {type: date, choiceOf: value, index: 3} package_version: vzvz-core-0.1.0-beta-2 class: extension kind: complex-type url: http://fhir.nl/StructureDefinition/Patient.birthDate base: http://hl7.org/fhir/StructureDefinition/Extension version: null