description: 'R4B: `AuditEvent.period` (new:Period)' package_name: hl7.fhir.uv.xver-r4b.r5 derivation: constraint name: ExtensionAuditEvent_Period type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-AuditEvent.period'} index: 0 value: short: When the activity occurred choices: [valuePeriod] base: {max: '1', min: 0, path: 'Extension.value[x]'} index: 2 valuePeriod: short: When the activity occurred type: Period base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value index: 3 package_version: 0.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/4.3/StructureDefinition/extension-AuditEvent.period base: http://hl7.org/fhir/StructureDefinition/Extension|5.0.0 version: 0.1.0 required: [url]