description: null package_name: fhir.nhs.uk.wayfinder derivation: constraint name: ExtensionWayfinderSpeciality type: Extension elements: url: pattern: {type: uri, value: 'https://fhir.nhs.uk/StructureDefinition/Extension-Specialty'} type: uri index: 0 value: choices: [valueCoding] index: 2 valueCoding: {type: Coding, choiceOf: value, index: 3} value[x]: elements: system: pattern: {type: uri, value: 'https://fhir.nhs.uk/STU3/CodeSystem/Specialty-1'} type: uri index: 4 display: {index: 5} required: [display, system] package_version: 1.0.3 class: extension kind: complex-type url: https://fhir.nhs.uk/StructureDefinition/Extension-Specialty base: http://hl7.org/fhir/StructureDefinition/Extension version: null