description: Distinguishes the type of involvement of the performer in the event. For example, 'author', 'verifier' or 'responsible party'. package_name: ontariomicdrfhirimplementationguide-0.10.00 derivation: constraint name: PerformerFunction type: Extension elements: url: pattern: {type: Uri, value: 'http://hl7.org/fhir/StructureDefinition/event-performerFunction'} index: 0 value: choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, choiceOf: value, index: 3} package_version: 0.9.13 class: extension kind: complex-type url: http://hl7.org/fhir/StructureDefinition/event-performerFunction base: http://hl7.org/fhir/StructureDefinition/Extension version: 4.0.1 required: [value, valueCodeableConcept]