description: An AlternativeUserID Number associated with this participant object. package_name: hl7.fhir.r5.core derivation: constraint name: AlternativeUserID type: Extension elements: extension: {index: 0} url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/auditevent-AlternativeUserID'} index: 1 value: choices: [valueIdentifier] index: 3 valueIdentifier: {type: Identifier, choiceOf: value, index: 4} package_version: 5.0.0-ballot extensions: {} class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/auditevent-AlternativeUserID base: http://hl7.org/fhir/StructureDefinition/Extension version: 5.0.0-ballot required: [valueIdentifier, value]