{
  "description": "R5: `AllergyIntolerance.type` additional types (CodeableConcept) additional types from child elements (coding)",
  "_filename": "StructureDefinition-ext-R5-AllergyIntolerance.type.json",
  "package_name": "hl7.fhir.uv.xver-r5.r3",
  "date": "2026-03-17T21:02:03.8104715+00:00",
  "derivation": "constraint",
  "publisher": "FHIR Infrastructure",
  "fhirVersion": "3.0.2",
  "jurisdiction": [ {
    "coding": [ {
      "code": "001",
      "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "display": "World"
    } ]
  } ],
  "purpose": "This extension is part of the cross-version definitions generated to enable use of the\r\nelement `AllergyIntolerance.type` as defined in FHIR R5\r\nin FHIR STU3.\r\n\r\nThe source element is defined as:\r\n`AllergyIntolerance.type` 0..1 `CodeableConcept`\r\n\r\nAcross FHIR versions, the element set has been mapped as:\r\n*  R5: `AllergyIntolerance.type` 0..1 `CodeableConcept`\n*  R4B: `AllergyIntolerance.type` 0..1 `code`\n*  R4: `AllergyIntolerance.type` 0..1 `code`\n*  STU3: `AllergyIntolerance.type` 0..1 `code`\r\n\r\nFollowing are the generation technical comments:\r\nElement `AllergyIntolerance.type` is mapped to FHIR STU3 element `AllergyIntolerance.type` as `SourceIsBroaderThanTarget`.\nThe mappings for `AllergyIntolerance.type` do not cover the following types: CodeableConcept.\nThe mappings for `AllergyIntolerance.type` do not cover the following types based on type expansion: coding.",
  "name": "ExtensionAllergyIntolerance_Type",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": "false",
  "resourceType": "StructureDefinition",
  "title": "R5: type additional types",
  "package_version": "0.1.0",
  "extension": [ {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
    "valueCode": "fhir"
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/package-source",
    "extension": [ {
      "url": "packageId",
      "valueId": "hl7.fhir.uv.xver-r5.r3"
    }, {
      "url": "version",
      "valueString": "0.1.0"
    }, {
      "url": "uri",
      "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r3"
    } ]
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 0,
    "_valueInteger": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r3"
      } ]
    }
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use",
    "_valueCode": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r3"
      } ]
    }
  } ],
  "snapshot": {
    "element": [ {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children",
        "xpath": "@value|f:*|h:div",
        "source": "http://hl7.org/fhir/StructureDefinition/Element",
        "severity": "error",
        "expression": "hasValue() | (children().count() > id.count())"
      }, {
        "key": "ext-1",
        "human": "Must have either extensions or value[x], not both",
        "xpath": "exists(f:extension)!=exists(f:*[starts-with(local-name(.), 'value')])",
        "source": "http://hl7.org/fhir/StructureDefinition/Extension",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension",
      "min": 0,
      "definition": "R5: `AllergyIntolerance.type` additional types (CodeableConcept) additional types from child elements (coding)",
      "isModifier": false,
      "short": "R5: type additional types",
      "max": "1",
      "id": "Extension",
      "condition": [ "ele-1" ],
      "comment": "Element `AllergyIntolerance.type` is mapped to FHIR STU3 element `AllergyIntolerance.type` as `SourceIsBroaderThanTarget`.\nThe mappings for `AllergyIntolerance.type` do not cover the following types: CodeableConcept.\nThe mappings for `AllergyIntolerance.type` do not cover the following types based on type expansion: coding.\nAllergic (typically immune-mediated) reactions have been traditionally regarded as an indicator for potential escalation to significant future risk. Contemporary knowledge suggests that some reactions previously thought to be immune-mediated are, in fact, non-immune, but in some cases can still pose a life threatening risk. It is acknowledged that many clinicians might not be in a position to distinguish the mechanism of a particular reaction. Often the term \"allergy\" is used rather generically and may overlap with the use of \"intolerance\" - in practice the boundaries between these two concepts might not be well-defined or understood. This data element is included nevertheless, because many legacy systems have captured this attribute. Immunologic testing may provide supporting evidence for the basis of the reaction and the causative substance, but no tests are 100% sensitive or specific for sensitivity to a particular substance. If, as is commonly the case, it is unclear whether the reaction is due to an allergy or an intolerance, then the type element should be omitted from the resource.",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      }
    }, {
      "path": "Extension.id",
      "min": 0,
      "definition": "unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
      "short": "xml:id (or equivalent in JSON)",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "string"
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      }
    }, {
      "path": "Extension.extension",
      "min": 0,
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. In order to make the use of extensions safe and manageable, there is a strict set of governance  applied to the definition and use of extensions. Though any implementer is allowed to define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "short": "Additional Content defined by implementations",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "slicing": {
        "rules": "open",
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "alias": [ "extensions", "user content" ],
      "max": "*",
      "id": "Extension.extension",
      "comment": "There can be no stigma associated with the use of extensions by any application, project, or standard - regardless of the institution or jurisdiction that uses or defines the extensions.  The use of extensions is what allows the FHIR specification to retain a core level of simplicity for everyone.",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      }
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/5.0/StructureDefinition/extension-AllergyIntolerance.type",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "uri"
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.url",
      "comment": "The definition may point directly to a computable or human-readable definition of the extensibility codes, or it may be a logical URI as declared in some other specification. The definition SHALL be a URI for the Structure Definition defining the extension.",
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      }
    }, {
      "path": "Extension.value[x]",
      "min": 0,
      "definition": "Identification of the underlying physiological mechanism for the reaction risk.",
      "short": "allergy | intolerance - Underlying mechanism (if known)",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "CodeableConcept"
      } ],
      "binding": {
        "strength": "preferred",
        "description": "Identification of the underlying physiological mechanism for a Reaction Risk.",
        "valueSetUri": "http://hl7.org/fhir/ValueSet/allergy-intolerance-type|3.0.2"
      },
      "max": "1",
      "id": "Extension.value[x]",
      "comment": "Allergic (typically immune-mediated) reactions have been traditionally regarded as an indicator for potential escalation to significant future risk. Contemporary knowledge suggests that some reactions previously thought to be immune-mediated are, in fact, non-immune, but in some cases can still pose a life threatening risk. It is acknowledged that many clinicians might not be in a position to distinguish the mechanism of a particular reaction. Often the term \"allergy\" is used rather generically and may overlap with the use of \"intolerance\" - in practice the boundaries between these two concepts might not be well-defined or understood. This data element is included nevertheless, because many legacy systems have captured this attribute. Immunologic testing may provide supporting evidence for the basis of the reaction and the causative substance, but no tests are 100% sensitive or specific for sensitivity to a particular substance. If, as is commonly the case, it is unclear whether the reaction is due to an allergy or an intolerance, then the type element should be omitted from the resource.",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      }
    } ]
  },
  "status": "active",
  "id": "e0b94846-cd89-408e-9767-e2bd061a68ad",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/5.0/StructureDefinition/extension-AllergyIntolerance.type",
  "context": [ "AllergyIntolerance.type" ],
  "version": "0.1.0",
  "differential": {
    "element": [ {
      "path": "Extension",
      "min": 0,
      "definition": "R5: `AllergyIntolerance.type` additional types (CodeableConcept) additional types from child elements (coding)",
      "isModifier": false,
      "short": "R5: type additional types",
      "max": "1",
      "id": "Extension",
      "comment": "Element `AllergyIntolerance.type` is mapped to FHIR STU3 element `AllergyIntolerance.type` as `SourceIsBroaderThanTarget`.\nThe mappings for `AllergyIntolerance.type` do not cover the following types: CodeableConcept.\nThe mappings for `AllergyIntolerance.type` do not cover the following types based on type expansion: coding.\nAllergic (typically immune-mediated) reactions have been traditionally regarded as an indicator for potential escalation to significant future risk. Contemporary knowledge suggests that some reactions previously thought to be immune-mediated are, in fact, non-immune, but in some cases can still pose a life threatening risk. It is acknowledged that many clinicians might not be in a position to distinguish the mechanism of a particular reaction. Often the term \"allergy\" is used rather generically and may overlap with the use of \"intolerance\" - in practice the boundaries between these two concepts might not be well-defined or understood. This data element is included nevertheless, because many legacy systems have captured this attribute. Immunologic testing may provide supporting evidence for the basis of the reaction and the causative substance, but no tests are 100% sensitive or specific for sensitivity to a particular substance. If, as is commonly the case, it is unclear whether the reaction is due to an allergy or an intolerance, then the type element should be omitted from the resource.",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      }
    }, {
      "id": "Extension.url",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "path": "Extension.url",
      "fixedUri": "http://hl7.org/fhir/5.0/StructureDefinition/extension-AllergyIntolerance.type"
    }, {
      "path": "Extension.value[x]",
      "min": 0,
      "definition": "Identification of the underlying physiological mechanism for the reaction risk.",
      "short": "allergy | intolerance - Underlying mechanism (if known)",
      "type": [ {
        "code": "CodeableConcept"
      } ],
      "binding": {
        "strength": "preferred",
        "description": "Identification of the underlying physiological mechanism for a Reaction Risk.",
        "valueSetUri": "http://hl7.org/fhir/ValueSet/allergy-intolerance-type|3.0.2"
      },
      "max": "1",
      "id": "Extension.value[x]",
      "comment": "Allergic (typically immune-mediated) reactions have been traditionally regarded as an indicator for potential escalation to significant future risk. Contemporary knowledge suggests that some reactions previously thought to be immune-mediated are, in fact, non-immune, but in some cases can still pose a life threatening risk. It is acknowledged that many clinicians might not be in a position to distinguish the mechanism of a particular reaction. Often the term \"allergy\" is used rather generically and may overlap with the use of \"intolerance\" - in practice the boundaries between these two concepts might not be well-defined or understood. This data element is included nevertheless, because many legacy systems have captured this attribute. Immunologic testing may provide supporting evidence for the basis of the reaction and the causative substance, but no tests are 100% sensitive or specific for sensitivity to a particular substance. If, as is commonly the case, it is unclear whether the reaction is due to an allergy or an intolerance, then the type element should be omitted from the resource.",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      }
    } ]
  },
  "contact": [ {
    "name": "FHIR Infrastructure",
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/fiwg",
      "system": "url"
    } ]
  } ],
  "contextType": "resource",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension"
}