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Examples of Use for Extension

Narrative

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Generated Narrative: StructureDefinition ext-R2-ConceptMap.ele.tar.equivalence

Name	Flags	Card.	Type	Description & Constraints
Extension		1..1	Extension(5.0.0)	DSTU2: equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint additional codes
url		1..1	uri	"http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence"
value[x]		1..1	code	equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint Binding: R2ConceptMapEquivalenceForR5ConceptMapRelationship (0.1.0) (required): The degree of equivalence between concepts.
Documentation for this format

Source1

{
  "resourceType": "StructureDefinition",
  "id": "ext-R2-ConceptMap.ele.tar.equivalence",
  "text": {
    "status": "extensions",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "extension": [
        {
          "url": "packageId",
          "valueId": "hl7.fhir.uv.xver-r2.r5"
        },
        {
          "url": "version",
          "valueString": "0.1.0"
        },
        {
          "url": "uri",
          "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r2.r5"
        }
      ],
      "url": "http://hl7.org/fhir/StructureDefinition/package-source"
    },
    {
      "extension": [
        {
          "url": "startFhirVersion",
          "valueCode": "5.0"
        },
        {
          "url": "endFhirVersion",
          "valueCode": "5.0"
        }
      ],
      "url": "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    },
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-type-characteristics",
      "valueCode": "can-bind"
    },
    {
      "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-r2.r5"
          }
        ]
      }
    },
    {
      "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-r2.r5"
          }
        ]
      }
    }
  ],
  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
  "version": "0.1.0",
  "name": "ExtensionConceptMap_Element_Target_Equivalence",
  "title": "DSTU2: equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint additional codes",
  "status": "active",
  "experimental": false,
  "date": "2026-03-17T21:02:03.8104715+00:00",
  "publisher": "FHIR Infrastructure",
  "contact": [
    {
      "name": "FHIR Infrastructure",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "DSTU2: `ConceptMap.element.target.equivalence` additional codes",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001",
          "display": "World"
        }
      ]
    }
  ],
  "purpose": "This extension is part of the cross-version definitions generated to enable use of the\r\nelement `ConceptMap.element.target.equivalence` as defined in FHIR DSTU2\r\nin FHIR R5.\r\n\r\nThe source element is defined as:\r\n`ConceptMap.element.target.equivalence` 1..1 `code`\r\n\r\nAcross FHIR versions, the element set has been mapped as:\r\n*  DSTU2: `ConceptMap.element.target.equivalence` 1..1 `code`\n*  STU3: `ConceptMap.group.element.target.equivalence` 0..1 `code`\n*  R4: `ConceptMap.group.element.target.equivalence` 1..1 `code`\n*  R4B: `ConceptMap.group.element.target.equivalence` 1..1 `code`\n*  R5: `ConceptMap.group.element.target.relationship` 1..1 `code`\r\n\r\nFollowing are the generation technical comments:\r\nElement `ConceptMap.element.target.equivalence` is mapped to FHIR R5 element `ConceptMap.group.element.target.relationship` as `RelatedTo`.\nThe mappings for `ConceptMap.element.target.equivalence` do not allow expression of the necessary codes, per the bindings on the source and target.\nThe target context `ConceptMap.group.element.target.relationship` is a modifier element, so this extension does not need to be defined as a modifier.",
  "fhirVersion": "5.0.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "ConceptMap.group.element.target.relationship"
    }
  ],
  "type": "Extension",
  "baseDefinition": "http://hl7.org/fhir/StructureDefinition/Extension|5.0.0",
  "derivation": "constraint",
  "snapshot": {
    "extension": [
      {
        "url": "http://hl7.org/fhir/tools/StructureDefinition/snapshot-base-version",
        "valueString": "5.0.0"
      }
    ],
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "DSTU2: equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint additional codes",
        "definition": "DSTU2: `ConceptMap.element.target.equivalence` additional codes",
        "comment": "Element `ConceptMap.element.target.equivalence` is mapped to FHIR R5 element `ConceptMap.group.element.target.relationship` as `RelatedTo`.\nThe mappings for `ConceptMap.element.target.equivalence` do not allow expression of the necessary codes, per the bindings on the source and target.\nThe target context `ConceptMap.group.element.target.relationship` is a modifier element, so this extension does not need to be defined as a modifier.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "source": "http://hl7.org/fhir/StructureDefinition/Element|5.0.0"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension|5.0.0"
          }
        ],
        "isModifier": false
      },
      {
        "id": "Extension.id",
        "path": "Extension.id",
        "representation": [
          "xmlAttr"
        ],
        "short": "Unique id for inter-element referencing",
        "definition": "Unique id for the element within a resource (for internal references). This may be any string value that does not contain spaces.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Element.id",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "id"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "condition": [
          "ele-1"
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.extension",
        "path": "Extension.extension",
        "slicing": {
          "discriminator": [
            {
              "type": "value",
              "path": "url"
            }
          ],
          "description": "Extensions are always sliced by (at least) url",
          "rules": "open"
        },
        "short": "Additional content defined by implementations",
        "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 managable, 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.",
        "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.",
        "alias": [
          "extensions",
          "user content"
        ],
        "min": 0,
        "max": "*",
        "base": {
          "path": "Element.extension",
          "min": 0,
          "max": "*"
        },
        "type": [
          {
            "code": "Extension"
          }
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "source": "http://hl7.org/fhir/StructureDefinition/Element|5.0.0"
          },
          {
            "key": "ext-1",
            "severity": "error",
            "human": "Must have either extensions or value[x], not both",
            "expression": "extension.exists() != value.exists()",
            "source": "http://hl7.org/fhir/StructureDefinition/Extension|5.0.0"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "n/a"
          }
        ]
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "representation": [
          "xmlAttr"
        ],
        "short": "identifies the meaning of the extension",
        "definition": "Source of the definition for the extension code - a logical name or a 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.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "type": [
          {
            "extension": [
              {
                "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-fhir-type",
                "valueUrl": "uri"
              }
            ],
            "code": "http://hl7.org/fhirpath/System.String"
          }
        ],
        "fixedUri": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint",
        "definition": "The equivalence between the source and target concepts (counting for the dependencies and products). The equivalence is read from target to source (e.g. the target is 'wider' than the source).",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "condition": [
          "ext-1"
        ],
        "constraint": [
          {
            "key": "ele-1",
            "severity": "error",
            "human": "All FHIR elements must have a @value or children",
            "expression": "hasValue() or (children().count() > id.count())",
            "source": "http://hl7.org/fhir/StructureDefinition/Element|5.0.0"
          }
        ],
        "isModifier": false,
        "isSummary": false,
        "binding": {
          "strength": "required",
          "description": "The degree of equivalence between concepts.",
          "valueSet": "http://hl7.org/fhir/uv/xver/ValueSet/R2-concept-map-equivalence-for-R5-concept-map-relationship|0.1.0"
        },
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "DSTU2: equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint additional codes",
        "definition": "DSTU2: `ConceptMap.element.target.equivalence` additional codes",
        "comment": "Element `ConceptMap.element.target.equivalence` is mapped to FHIR R5 element `ConceptMap.group.element.target.relationship` as `RelatedTo`.\nThe mappings for `ConceptMap.element.target.equivalence` do not allow expression of the necessary codes, per the bindings on the source and target.\nThe target context `ConceptMap.group.element.target.relationship` is a modifier element, so this extension does not need to be defined as a modifier.",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension",
          "min": 0,
          "max": "*"
        },
        "isModifier": false
      },
      {
        "id": "Extension.url",
        "path": "Extension.url",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.url",
          "min": 1,
          "max": "1"
        },
        "fixedUri": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "equivalent | equal | wider | subsumes | narrower | specializes | inexact | unmatched | disjoint",
        "definition": "The equivalence between the source and target concepts (counting for the dependencies and products). The equivalence is read from target to source (e.g. the target is 'wider' than the source).",
        "min": 1,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "code"
          }
        ],
        "binding": {
          "strength": "required",
          "description": "The degree of equivalence between concepts.",
          "valueSet": "http://hl7.org/fhir/uv/xver/ValueSet/R2-concept-map-equivalence-for-R5-concept-map-relationship|0.1.0"
        }
      }
    ]
  }
}