description: The period during which the resource content was or is planned to be effective. package_name: hl7.fhir.r3.examples derivation: constraint name: effectivePeriod type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/resource-effectivePeriod'} index: 1 valuePeriod: {type: Period, index: 2} package_version: 3.0.2 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/resource-effectivePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: null