description: This cross-version extension represents Appointment.class from http://hl7.org/fhir/StructureDefinition/Appointment|5.0.0 for use in FHIR R4. package_name: hl7.fhir.uv.xver derivation: constraint name: ext_R5_Appointment_class type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Classification when becoming an encounter choices: [valueCodeableConcept] index: 1 valueCodeableConcept: base: {path: 'Extension.value[x]'} type: CodeableConcept short: Classification when becoming an encounter choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/5.0/StructureDefinition/extension-Appointment.class'} index: 3 package_version: r5.r4-0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/5.0/StructureDefinition/extension-Appointment.class base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]