description: An AlternativeUserID Number associated with this participant object. package_name: hl7.fhir.uv.extensions derivation: constraint name: AEAlternativeUserID type: Extension elements: extension: {index: 0} url: pattern: {type: uri, value: 'http://hl7.org/fhir/StructureDefinition/auditevent-AlternativeUserID'} type: uri index: 1 value: choices: [valueIdentifier] index: 3 valueIdentifier: {type: Identifier, choiceOf: value, index: 4} package_version: 5.3.0-ballot-tc extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/auditevent-AlternativeUserID base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.3.0-ballot-tc required: [value, valueIdentifier]