description: This extends the Service Request Resource to support the underlying reason why a Service Request is urgent. package_name: fhir.r4.ukcore.stu2 derivation: constraint name: ExtensionUKCorePriorityReason type: Extension elements: url: pattern: {type: uri, value: 'https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-PriorityReason'} type: uri index: 0 value: short: This describes the reason a service request is urgent choices: [valueCodeableConcept] index: 2 valueCodeableConcept: {type: CodeableConcept, short: This describes the reason a service request is urgent, choiceOf: value, index: 3} package_version: 2.0.2 class: extension kind: complex-type url: https://fhir.hl7.org.uk/StructureDefinition/Extension-UKCore-PriorityReason base: http://hl7.org/fhir/StructureDefinition/Extension version: 1.0.0 required: [value, valueCodeableConcept]