description: Previous identifiers used to reference this case package_name: hl7.fhir.us.icsr-ae-reporting derivation: constraint name: PreviousCaseIdentifier type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/us/icsr-ae-reporting/StructureDefinition/icsr-ext-previouscaseidentifier'} index: 1 value: mustSupport: true choices: [valueIdentifier] index: 3 valueIdentifier: {type: Identifier, mustSupport: true, choiceOf: value, index: 4} value[x]: elements: system: pattern: {type: Uri, value: 'urn:oid:2.16.840.1.113883.3.989.2.1.3.3'} index: 5 value: {mustSupport: true, index: 6} assigner: {mustSupport: true, index: 7} required: [assigner, value, system] package_version: 1.0.1 extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/us/icsr-ae-reporting/StructureDefinition/icsr-ext-previouscaseidentifier base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.1 required: [valueIdentifier, value]