description: 'R5: `Appointment.class` (new:CodeableConcept)' package_name: hl7.fhir.uv.xver-r5.r3 derivation: constraint name: ExtensionAppointment_Class type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Appointment.class'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: Classification when becoming an encounter choices: [valueCodeableConcept] index: 2 valueCodeableConcept: short: Classification when becoming an encounter type: CodeableConcept base: {max: '1', min: 0, path: 'Extension.value[x]'} choiceOf: value index: 3 package_version: 0.1.0 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Appointment.class base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.1.0 required: [url]