description: This cross-version extension represents Immunization.vaccinationProtocol.doseStatusReason from http://hl7.org/fhir/StructureDefinition/Immunization|3.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r3.r4b derivation: constraint name: ext_R3_Immunization_va_doseStatusReason type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Why dose does (not) count choices: [valueCodeableConcept] index: 1 valueCodeableConcept: base: {path: 'Extension.value[x]'} type: CodeableConcept short: Why dose does (not) count choiceOf: value index: 2 url: pattern: {type: Uri, value: 'http://hl7.org/fhir/3.0/StructureDefinition/extension-Immunization.vaccinationProtocol.doseStatusReason'} index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/3.0/StructureDefinition/extension-Immunization.vaccinationProtocol.doseStatusReason base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]