description: 'R4B: `RequestGroup.identifier` additional types (Identifier) additional types from child elements (assigner, period, system, type, use, value)' package_name: hl7.fhir.uv.xver-r4b.r3 derivation: constraint name: ExtensionRequestGroup_Identifier type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/4.3/StructureDefinition/extension-RequestGroup.identifier'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Business identifier choices: [valueIdentifier] index: 2 valueIdentifier: short: Business identifier type: Identifier 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-RequestGroup.identifier base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.1.0 required: [url]