description: This cross-version extension represents AllergyIntolerance.status from http://hl7.org/fhir/StructureDefinition/AllergyIntolerance|1.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver derivation: constraint name: Ext_R2_AllergyIntolerance_status type: Extension elements: url: base: {max: '1', min: 1, path: Extension.url} pattern: {type: Uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-AllergyIntolerance.status'} index: 0 value: base: {max: '1', min: 0, path: 'Extension.value[x]'} short: active | unconfirmed | confirmed | inactive | resolved | refuted | entered-in-error choices: [valueCode] index: 2 valueCode: base: {max: '1', min: 0, path: 'Extension.value[x]'} type: code short: active | unconfirmed | confirmed | inactive | resolved | refuted | entered-in-error choiceOf: value index: 3 package_version: r2.r4b-0.0.1-snapshot-2 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-AllergyIntolerance.status base: http://hl7.org/fhir/StructureDefinition/Extension|4.3.0 version: 0.0.1-snapshot-2 required: [url]