{
  "description": "R5: `ConceptMap.additionalAttribute` (new:BackboneElement)",
  "_filename": "StructureDefinition-ext-R5-ConceptMap.additionalAttribute.json",
  "package_name": "hl7.fhir.uv.xver-r5.r4b",
  "date": "2026-03-17T21:02:03.8104715+00:00",
  "derivation": "constraint",
  "publisher": "FHIR Infrastructure",
  "fhirVersion": "4.3.0",
  "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 `ConceptMap.additionalAttribute` as defined in FHIR R5\r\nin FHIR R4B.\r\n\r\nThe source element is defined as:\r\n`ConceptMap.additionalAttribute` 0..* `BackboneElement`\r\n\r\nFollowing are the generation technical comments:\r\nElement `ConceptMap.additionalAttribute` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
  "name": "ExtensionConceptMap_AdditionalAttribute",
  "mapping": [ {
    "uri": "http://hl7.org/v3",
    "name": "RIM Mapping",
    "identity": "rim"
  } ],
  "abstract": false,
  "type": "Extension",
  "experimental": "false",
  "resourceType": "StructureDefinition",
  "title": "R5: Definition of an additional attribute to act as a data source or target (new)",
  "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.r4b"
    }, {
      "url": "version",
      "valueString": "0.1.0"
    }, {
      "url": "uri",
      "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4b"
    } ]
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/version-specific-use",
    "extension": [ {
      "url": "startFhirVersion",
      "valueCode": "4.3"
    }, {
      "url": "endFhirVersion",
      "valueCode": "4.3"
    } ]
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fmm",
    "valueInteger": 0,
    "_valueInteger": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4b"
      } ]
    }
  }, {
    "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-standards-status",
    "valueCode": "trial-use",
    "_valueCode": {
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-conformance-derivedFrom",
        "valueCanonical": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r5.r4b"
      } ]
    }
  } ],
  "snapshot": {
    "element": [ {
      "constraint": [ {
        "key": "ele-1",
        "human": "All FHIR elements must have a @value or children unless an empty Parameters resource",
        "xpath": "@value|f:*|h:div|self::f:Parameters",
        "source": "http://hl7.org/fhir/StructureDefinition/Element|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count()) or $this is Parameters"
      }, {
        "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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute` (new:BackboneElement)",
      "isModifier": false,
      "short": "R5: Definition of an additional attribute to act as a data source or target (new)",
      "max": "*",
      "id": "Extension",
      "condition": [ "ele-1" ],
      "comment": "Element `ConceptMap.additionalAttribute` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).\nAdditional attributes are used to define additional data elements where mapping data can be found. For an example, see [Specimen Type v2 -> SNOMED CT Mapping(conceptmap-example-specimen-type.html)",
      "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.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "id"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "min": 2,
      "definition": "An Extension",
      "isModifier": false,
      "short": "Extension",
      "slicing": {
        "rules": "open",
        "ordered": false,
        "description": "Extensions are always sliced by (at least) url",
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      },
      "type": [ {
        "code": "Extension"
      } ],
      "max": "*",
      "id": "Extension.extension",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.code` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.code` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.code` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 1,
      "definition": "R5: `ConceptMap.additionalAttribute.code` (new:code)",
      "isModifier": false,
      "short": "R5: Identifies this additional attribute through this resource (new)",
      "type": [ {
        "code": "Extension"
      } ],
      "sliceName": "code",
      "max": "1",
      "id": "Extension.extension:code",
      "comment": "Element `ConceptMap.additionalAttribute.code` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.code` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.code` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.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.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "id"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:code.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. 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 can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "isModifier": false,
      "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:code.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"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "code",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:code.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"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 1,
      "definition": "A code that is used to identify this additional data attribute. The code is used internally in ConceptMap.group.element.target.dependsOn.attribute and ConceptMap.group.element.target.product.attribute.",
      "isModifier": false,
      "short": "Identifies this additional attribute through this resource",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "code"
      } ],
      "max": "1",
      "id": "Extension.extension:code.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.uri` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.uri` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.uri` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute.uri` (new:uri)",
      "isModifier": false,
      "short": "R5: Formal identifier for the data element referred to in this attribte (new)",
      "type": [ {
        "code": "Extension"
      } ],
      "sliceName": "uri",
      "max": "1",
      "id": "Extension.extension:uri",
      "comment": "Element `ConceptMap.additionalAttribute.uri` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.uri` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.uri` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.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.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "id"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:uri.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. 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 can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "isModifier": false,
      "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:uri.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"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "uri",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:uri.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"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 0,
      "definition": "Reference to the formal definition of the source/target data element. For elements defined by the FHIR specification, or using a FHIR logical model, the correct format is {canonical-url}#{element-id}.",
      "isModifier": false,
      "short": "Formal identifier for the data element referred to in this attribte",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "uri"
      } ],
      "max": "1",
      "id": "Extension.extension:uri.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.description` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.description` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.description` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute.description` (new:string)",
      "isModifier": false,
      "short": "R5: Why the additional attribute is defined, and/or what the data element it refers to is (new)",
      "type": [ {
        "code": "Extension"
      } ],
      "sliceName": "description",
      "max": "1",
      "id": "Extension.extension:description",
      "comment": "Element `ConceptMap.additionalAttribute.description` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.description` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.description` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.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.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "id"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:description.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. 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 can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "isModifier": false,
      "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:description.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"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "description",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:description.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"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 0,
      "definition": "A description of the additional attribute and/or the data element it refers to - why it is defined, and how the value might be used in mappings, and a discussion of issues associated with the use of the data element.",
      "isModifier": false,
      "short": "Why the additional attribute is defined, and/or what the data element it refers to is",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "string"
      } ],
      "max": "1",
      "id": "Extension.extension:description.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.type` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.type` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.type` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 1,
      "definition": "R5: `ConceptMap.additionalAttribute.type` (new:code)",
      "isModifier": false,
      "short": "R5: code | Coding | string | boolean | Quantity (new)",
      "type": [ {
        "code": "Extension"
      } ],
      "sliceName": "type",
      "max": "1",
      "id": "Extension.extension:type",
      "comment": "Element `ConceptMap.additionalAttribute.type` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.type` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.type` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).\nWhen the source or target is not content defined by FHIR, some additional application logic might be required to map from the FHIR Datatype to the externally defined content",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Element.extension"
      },
      "isSummary": false
    }, {
      "path": "Extension.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.",
      "isModifier": false,
      "short": "Unique id for inter-element referencing",
      "mapping": [ {
        "map": "n/a",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "id"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:type.id",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Element.id"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (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|4.3.0",
        "severity": "error",
        "expression": "extension.exists() != value.exists()"
      } ],
      "path": "Extension.extension.extension",
      "min": 0,
      "definition": "May be used to represent additional information that is not part of the basic definition of the element. 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 can define an extension, there is a set of requirements that SHALL be met as part of the definition of the extension.",
      "isModifier": false,
      "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:type.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"
      },
      "isSummary": false
    }, {
      "path": "Extension.extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "type",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "uri"
        } ]
      } ],
      "representation": [ "xmlAttr" ],
      "max": "1",
      "id": "Extension.extension:type.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"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.extension.value[x]",
      "min": 1,
      "definition": "The type of the source data contained in this concept map for this data element.",
      "isModifier": false,
      "short": "code | Coding | string | boolean | Quantity",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "code"
      } ],
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/uv/xver/ValueSet/R5-conceptmap-attribute-type-for-R4B|0.1.0",
        "description": "The type of a mapping attribute value."
      },
      "max": "1",
      "id": "Extension.extension:type.value[x]",
      "comment": "When the source or target is not content defined by FHIR, some additional application logic might be required to map from the FHIR Datatype to the externally defined content",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    }, {
      "path": "Extension.url",
      "min": 1,
      "definition": "Source of the definition for the extension code - a logical name or a URL.",
      "isModifier": false,
      "short": "identifies the meaning of the extension",
      "fixedUri": "http://hl7.org/fhir/5.0/StructureDefinition/extension-ConceptMap.additionalAttribute",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "http://hl7.org/fhirpath/System.String",
        "extension": [ {
          "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
          "valueUrl": "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"
      },
      "isSummary": false
    }, {
      "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|4.3.0",
        "severity": "error",
        "expression": "hasValue() or (children().count() > id.count())"
      } ],
      "path": "Extension.value[x]",
      "min": 0,
      "definition": "Value of extension - must be one of a constrained set of the data types (see [Extensibility](http://hl7.org/fhir/R4B/extensibility.html) for a list).",
      "isModifier": false,
      "short": "Value of extension",
      "mapping": [ {
        "map": "N/A",
        "identity": "rim"
      } ],
      "type": [ {
        "code": "base64Binary"
      }, {
        "code": "boolean"
      }, {
        "code": "canonical"
      }, {
        "code": "code"
      }, {
        "code": "date"
      }, {
        "code": "dateTime"
      }, {
        "code": "decimal"
      }, {
        "code": "id"
      }, {
        "code": "instant"
      }, {
        "code": "integer"
      }, {
        "code": "markdown"
      }, {
        "code": "oid"
      }, {
        "code": "positiveInt"
      }, {
        "code": "string"
      }, {
        "code": "time"
      }, {
        "code": "unsignedInt"
      }, {
        "code": "uri"
      }, {
        "code": "url"
      }, {
        "code": "uuid"
      }, {
        "code": "Address"
      }, {
        "code": "Age"
      }, {
        "code": "Annotation"
      }, {
        "code": "Attachment"
      }, {
        "code": "CodeableConcept"
      }, {
        "code": "CodeableReference"
      }, {
        "code": "Coding"
      }, {
        "code": "ContactPoint"
      }, {
        "code": "Count"
      }, {
        "code": "Distance"
      }, {
        "code": "Duration"
      }, {
        "code": "HumanName"
      }, {
        "code": "Identifier"
      }, {
        "code": "Money"
      }, {
        "code": "Period"
      }, {
        "code": "Quantity"
      }, {
        "code": "Range"
      }, {
        "code": "Ratio"
      }, {
        "code": "RatioRange"
      }, {
        "code": "Reference"
      }, {
        "code": "SampledData"
      }, {
        "code": "Signature"
      }, {
        "code": "Timing"
      }, {
        "code": "ContactDetail"
      }, {
        "code": "Contributor"
      }, {
        "code": "DataRequirement"
      }, {
        "code": "Expression"
      }, {
        "code": "ParameterDefinition"
      }, {
        "code": "RelatedArtifact"
      }, {
        "code": "TriggerDefinition"
      }, {
        "code": "UsageContext"
      }, {
        "code": "Dosage"
      } ],
      "max": "0",
      "id": "Extension.value[x]",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "isSummary": false
    } ],
    "extension": [ {
      "url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
      "valueString": "4.3.0"
    } ]
  },
  "status": "active",
  "id": "1c41f64f-7f11-4ca1-a50e-ea297107e7a4",
  "kind": "complex-type",
  "url": "http://hl7.org/fhir/5.0/StructureDefinition/extension-ConceptMap.additionalAttribute",
  "context": [ {
    "type": "element",
    "expression": "ConceptMap"
  } ],
  "version": "0.1.0",
  "differential": {
    "element": [ {
      "path": "Extension",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute` (new:BackboneElement)",
      "isModifier": false,
      "short": "R5: Definition of an additional attribute to act as a data source or target (new)",
      "max": "*",
      "id": "Extension",
      "comment": "Element `ConceptMap.additionalAttribute` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).\nAdditional attributes are used to define additional data elements where mapping data can be found. For an example, see [Specimen Type v2 -> SNOMED CT Mapping(conceptmap-example-specimen-type.html)",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension"
      }
    }, {
      "id": "Extension.extension",
      "max": "*",
      "min": 2,
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension.extension"
      },
      "path": "Extension.extension",
      "slicing": {
        "rules": "open",
        "ordered": false,
        "discriminator": [ {
          "path": "url",
          "type": "value"
        } ]
      }
    }, {
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.code` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.code` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.code` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 1,
      "definition": "R5: `ConceptMap.additionalAttribute.code` (new:code)",
      "short": "R5: Identifies this additional attribute through this resource (new)",
      "sliceName": "code",
      "max": "1",
      "id": "Extension.extension:code",
      "comment": "Element `ConceptMap.additionalAttribute.code` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.code` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.code` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension.extension"
      }
    }, {
      "id": "Extension.extension:code.url",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "path": "Extension.extension.url",
      "fixedUri": "code"
    }, {
      "id": "Extension.extension:code.value[x]",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "path": "Extension.extension.value[x]",
      "type": [ {
        "code": "code"
      } ],
      "short": "Identifies this additional attribute through this resource",
      "definition": "A code that is used to identify this additional data attribute. The code is used internally in ConceptMap.group.element.target.dependsOn.attribute and ConceptMap.group.element.target.product.attribute."
    }, {
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.uri` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.uri` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.uri` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute.uri` (new:uri)",
      "short": "R5: Formal identifier for the data element referred to in this attribte (new)",
      "sliceName": "uri",
      "max": "1",
      "id": "Extension.extension:uri",
      "comment": "Element `ConceptMap.additionalAttribute.uri` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.uri` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.uri` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension.extension"
      }
    }, {
      "id": "Extension.extension:uri.url",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "path": "Extension.extension.url",
      "fixedUri": "uri"
    }, {
      "id": "Extension.extension:uri.value[x]",
      "max": "1",
      "min": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "path": "Extension.extension.value[x]",
      "type": [ {
        "code": "uri"
      } ],
      "short": "Formal identifier for the data element referred to in this attribte",
      "definition": "Reference to the formal definition of the source/target data element. For elements defined by the FHIR specification, or using a FHIR logical model, the correct format is {canonical-url}#{element-id}."
    }, {
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.description` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.description` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.description` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 0,
      "definition": "R5: `ConceptMap.additionalAttribute.description` (new:string)",
      "short": "R5: Why the additional attribute is defined, and/or what the data element it refers to is (new)",
      "sliceName": "description",
      "max": "1",
      "id": "Extension.extension:description",
      "comment": "Element `ConceptMap.additionalAttribute.description` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.description` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.description` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension.extension"
      }
    }, {
      "id": "Extension.extension:description.url",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "path": "Extension.extension.url",
      "fixedUri": "description"
    }, {
      "id": "Extension.extension:description.value[x]",
      "max": "1",
      "min": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "path": "Extension.extension.value[x]",
      "type": [ {
        "code": "string"
      } ],
      "short": "Why the additional attribute is defined, and/or what the data element it refers to is",
      "definition": "A description of the additional attribute and/or the data element it refers to - why it is defined, and how the value might be used in mappings, and a discussion of issues associated with the use of the data element."
    }, {
      "path": "Extension.extension",
      "requirements": "Element `ConceptMap.additionalAttribute.type` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.type` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.type` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).",
      "min": 1,
      "definition": "R5: `ConceptMap.additionalAttribute.type` (new:code)",
      "short": "R5: code | Coding | string | boolean | Quantity (new)",
      "sliceName": "type",
      "max": "1",
      "id": "Extension.extension:type",
      "comment": "Element `ConceptMap.additionalAttribute.type` is part of an existing definition because parent element `ConceptMap.additionalAttribute` requires a cross-version extension.\nElement `ConceptMap.additionalAttribute.type` has a context of ConceptMap based on following the parent source element upwards and mapping to `ConceptMap`.\nElement `ConceptMap.additionalAttribute.type` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element).\nWhen the source or target is not content defined by FHIR, some additional application logic might be required to map from the FHIR Datatype to the externally defined content",
      "base": {
        "max": "*",
        "min": 0,
        "path": "Extension.extension"
      }
    }, {
      "id": "Extension.extension:type.url",
      "max": "1",
      "min": 1,
      "base": {
        "max": "1",
        "min": 1,
        "path": "Extension.url"
      },
      "path": "Extension.extension.url",
      "fixedUri": "type"
    }, {
      "path": "Extension.extension.value[x]",
      "min": 1,
      "definition": "The type of the source data contained in this concept map for this data element.",
      "short": "code | Coding | string | boolean | Quantity",
      "type": [ {
        "code": "code"
      } ],
      "binding": {
        "strength": "required",
        "valueSet": "http://hl7.org/fhir/uv/xver/ValueSet/R5-conceptmap-attribute-type-for-R4B|0.1.0",
        "description": "The type of a mapping attribute value."
      },
      "max": "1",
      "id": "Extension.extension:type.value[x]",
      "comment": "When the source or target is not content defined by FHIR, some additional application logic might be required to map from the FHIR Datatype to the externally defined content",
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      }
    }, {
      "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-ConceptMap.additionalAttribute"
    }, {
      "id": "Extension.value[x]",
      "max": "0",
      "min": 0,
      "base": {
        "max": "1",
        "min": 0,
        "path": "Extension.value[x]"
      },
      "path": "Extension.value[x]"
    } ]
  },
  "contact": [ {
    "name": "FHIR Infrastructure",
    "telecom": [ {
      "value": "http://www.hl7.org/Special/committees/fiwg",
      "system": "url"
    } ]
  } ],
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension|4.3.0"
}