description: This cross-version extension represents AllergyIntolerance.reporter from http://hl7.org/fhir/StructureDefinition/AllergyIntolerance|1.0.2 for use in FHIR R4B. package_name: hl7.fhir.uv.xver-r2.r4b derivation: constraint name: ext_R2_AllergyIntolerance_reporter type: Extension elements: value: base: {path: 'Extension.value[x]'} short: Source of the information about the allergy choices: [valueReference] index: 1 valueReference: short: Source of the information about the allergy refers: ['http://hl7.org/fhir/StructureDefinition/Patient', 'http://hl7.org/fhir/StructureDefinition/Practitioner', 'http://hl7.org/fhir/StructureDefinition/RelatedPerson'] type: Reference base: {path: 'Extension.value[x]'} choiceOf: value index: 2 url: pattern: {type: uri, value: 'http://hl7.org/fhir/1.0/StructureDefinition/extension-AllergyIntolerance.reporter'} type: uri index: 3 package_version: 0.0.1-snapshot-1 class: extension kind: complex-type url: http://hl7.org/fhir/1.0/StructureDefinition/extension-AllergyIntolerance.reporter base: http://hl7.org/fhir/StructureDefinition/Extension version: 0.0.1-snapshot-1 required: [url]