description: The date when the value set version is no longer expected to be used to create new content. This is the first date-time when the value set version becomes Inactive, so this value MUST present on all Inactive value set versions. The start Date_time is expected to be as of 0001 UTC of the Expiration Date. package_name: rs/hl7.fhir.core derivation: constraint name: expirationDate type: Extension elements: extension: {index: 0} url: type: uri pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/codesystem-expirationDate'} index: 1 valueDate: {type: date, index: 2} package_version: 3.2.0 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/codesystem-expirationDate base: http://hl7.org/fhir/StructureDefinition/Extension version: null