description: This cross-version extension represents AuditEvent.object.identifier from http://hl7.org/fhir/StructureDefinition/AuditEvent|1.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver derivation: constraint name: Ext_R2_AuditEvent_ob_identifier type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-AuditEvent.object.identifier'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Specific instance of object (e.g. versioned) choices: [valueIdentifier] index: 2 valueIdentifier: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: Identifier short: Specific instance of object (e.g. versioned) choiceOf: value index: 3 package_version: r2.r4b-0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-AuditEvent.object.identifier base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url]