description: The date on which the asset content was last reviewed. Review happens periodically after that, but doesn't change the original approval date. package_name: hl7.fhir.r4.examples derivation: constraint name: lastReviewDate type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/resource-lastReviewDate'} index: 1 value: choices: [valueDate] index: 3 valueDate: {type: date, choiceOf: value, index: 4} package_version: 4.0.1 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/resource-lastReviewDate base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [value, valueDate]