description: The type of event applicable to an event message. package_name: NHSD.Assets.STU3 derivation: constraint name: Extension-MessageEventType-1 type: Extension elements: url: pattern: {type: Uri, value: 'https://fhir.nhs.uk/STU3/StructureDefinition/Extension-MessageEventType-1'} index: 0 valueCodeableConcept: type: CodeableConcept index: 1 slicing: slices: valueCodeableConcept: match: {} schema: type: CodeableConcept _required: true index: 1 elements: coding: index: 2 elements: system: {index: 3} version: {index: 4} code: {index: 5} display: {index: 6} userSelected: {index: 7} required: [display, system, code] text: {index: 8} required: [coding] package_version: 1.0.0 class: extension kind: complex-type url: https://fhir.nhs.uk/STU3/StructureDefinition/Extension-MessageEventType-1 base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0 required: [valueCodeableConcept]