description: The period during which the resource content was or is planned to be effective. package_name: hl7.fhir.core derivation: constraint name: The effective date range for the resource type: Extension elements: extension: index: 0 slicing: slices: extension: match: {} schema: {index: 0} max: 0 url: type: uri pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/resource-effectivePeriod'} index: 1 value: choices: [valuePeriod] index: 3 valuePeriod: {type: Period, choiceOf: value, index: 4} package_version: 1.8.0 extensions: extension: {url: null, max: 0, index: 0} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/resource-effectivePeriod base: http://hl7.org/fhir/StructureDefinition/Extension version: null required: [valuePeriod, value]