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{
  "resourceType": "ConceptMap",
  "id": "R2-MessageHeader-element-map-to-R4B",
  "text": {
    "status": "generated",
    "div": "<!-- snip (see above) -->"
  },
  "extension": [
    {
      "url": "http://hl7.org/fhir/StructureDefinition/structuredefinition-wg",
      "valueCode": "fhir"
    },
    {
      "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.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-r2.r4b"
          }
        ]
      }
    }
  ],
  "url": "http://hl7.org/fhir/uv/xver/ConceptMap/R2-MessageHeader-element-map-to-R4B",
  "version": "0.1.0",
  "name": "R2MessageHeaderElementMapToR4B",
  "title": "Cross-version mapping for FHIR DSTU2 MessageHeader to FHIR R4B MessageHeader",
  "status": "active",
  "experimental": false,
  "date": "2026-03-17T16:04:54.7343656-05:00",
  "contact": [
    {
      "name": "FHIR Infrastructure",
      "telecom": [
        {
          "system": "url",
          "value": "http://www.hl7.org/Special/committees/fiwg"
        }
      ]
    }
  ],
  "description": "This ConceptMap represents cross-version mappings for elements from a FHIR DSTU2 MessageHeader to FHIR R4B.",
  "jurisdiction": [
    {
      "coding": [
        {
          "system": "http://unstats.un.org/unsd/methods/m49/m49.htm",
          "code": "001",
          "display": "World"
        }
      ]
    }
  ],
  "sourceCanonical": "http://hl7.org/fhir/1.0",
  "targetUri": "http://hl7.org/fhir/4.3",
  "group": [
    {
      "source": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "sourceVersion": "1.0.2",
      "target": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "targetVersion": "4.3.0",
      "element": [
        {
          "code": "MessageHeader.meta",
          "display": "meta",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.meta",
              "display": "MessageHeader.meta",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.meta` is mapped to FHIR R4B element `MessageHeader.meta` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.meta` do not cover the following types: Meta.\nThe mappings for `MessageHeader.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId."
            }
          ]
        },
        {
          "code": "MessageHeader.implicitRules",
          "display": "implicitRules",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.implicitRules",
              "display": "MessageHeader.implicitRules",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.implicitRules` is mapped to FHIR R4B element `MessageHeader.implicitRules` as `Equivalent`.\nAsserting this rule set restricts the content to be only understood by a limited set of trading partners. This inherently limits the usefulness of the data in the long term. However, the existing health eco-system is highly fractured, and not yet ready to define, collect, and exchange data in a generally computable sense. Wherever possible, implementers and/or specification writers should avoid using this element as much as possible."
            }
          ]
        },
        {
          "code": "MessageHeader.language",
          "display": "language",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.language",
              "display": "MessageHeader.language",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.language` is mapped to FHIR R4B element `MessageHeader.language` as `Equivalent`.\nLanguage is provided to support indexing and accessibility (typically, services such as text to speech use the language tag). The html language tag in the narrative applies  to the narrative. The language tag on the resource may be used to specify the language of other presentations generated from the data in the resource  Not all the content has to be in the base language. The Resource.language should not be assumed to apply to the narrative automatically. If a language is specified, it should it also be specified on the div element in the html (see rules in HTML5 for information about the relationship between xml:lang and the html lang attribute)."
            }
          ]
        },
        {
          "code": "MessageHeader.text",
          "display": "text",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.text",
              "display": "MessageHeader.text",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.text` is mapped to FHIR R4B element `MessageHeader.text` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.text` do not cover the following types: Narrative.\nThe mappings for `MessageHeader.text` do not cover the following types based on type expansion: div, status.\nContained resources do not have narrative. Resources that are not contained SHOULD have a narrative."
            }
          ]
        },
        {
          "code": "MessageHeader.contained",
          "display": "contained",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.contained",
              "display": "MessageHeader.contained",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.contained` is mapped to FHIR R4B element `MessageHeader.contained` as `SourceIsBroaderThanTarget`.\nThis should never be done when the content can be identified properly, as once identification is lost, it is extremely difficult (and context dependent) to restore it again."
            }
          ]
        },
        {
          "code": "MessageHeader.event",
          "display": "event",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.event[x]",
              "display": "MessageHeader.event[x]",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.event` is mapped to FHIR R4B element `MessageHeader.event[x]` as `Equivalent`.\nThe target context `MessageHeader.event[x]` is a choice-type element and cannot directly hold extensions. The context is moved up to parent element `MessageHeader`."
            }
          ]
        },
        {
          "code": "MessageHeader.response",
          "display": "response",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.response",
              "display": "MessageHeader.response",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.response` is mapped to FHIR R4B element `MessageHeader.response` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.response.identifier",
          "display": "identifier",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.response.identifier",
              "display": "MessageHeader.response.identifier",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.response.identifier` is mapped to FHIR R4B element `MessageHeader.response.identifier` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.response.code",
          "display": "code",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.response.code",
              "display": "MessageHeader.response.code",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.response.code` is mapped to FHIR R4B element `MessageHeader.response.code` as `Equivalent`.\nThis is a generic response to the request message. Specific data for the response will be found in MessageHeader.data."
            }
          ]
        },
        {
          "code": "MessageHeader.response.details",
          "display": "details",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.response.details",
              "display": "MessageHeader.response.details",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.response.details` is mapped to FHIR R4B element `MessageHeader.response.details` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.response.details` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.response.details` with unmapped reference targets: OperationOutcome.\nThis SHALL be contained in the bundle. If any of the issues are errors, the response code SHALL be an error."
            }
          ]
        },
        {
          "code": "MessageHeader.source",
          "display": "source",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.source",
              "display": "MessageHeader.source",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.source` is mapped to FHIR R4B element `MessageHeader.source` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.source.name",
          "display": "name",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.source.name",
              "display": "MessageHeader.source.name",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.source.name` is mapped to FHIR R4B element `MessageHeader.source.name` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.source.software",
          "display": "software",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.source.software",
              "display": "MessageHeader.source.software",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.source.software` is mapped to FHIR R4B element `MessageHeader.source.software` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.source.version",
          "display": "version",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.source.version",
              "display": "MessageHeader.source.version",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.source.version` is mapped to FHIR R4B element `MessageHeader.source.version` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.source.contact",
          "display": "contact",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.source.contact",
              "display": "MessageHeader.source.contact",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.source.contact` is mapped to FHIR R4B element `MessageHeader.source.contact` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.source.contact` do not cover the following types: ContactPoint.\nThe mappings for `MessageHeader.source.contact` do not cover the following types based on type expansion: period, rank, system, use, value."
            }
          ]
        },
        {
          "code": "MessageHeader.source.endpoint",
          "display": "endpoint",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.source.endpoint",
              "display": "MessageHeader.source.endpoint",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.source.endpoint` is mapped to FHIR R4B element `MessageHeader.source.endpoint` as `Equivalent`.\nThe id may be a non-resolvable URI for systems that do not use standard network-based addresses."
            }
          ]
        },
        {
          "code": "MessageHeader.destination",
          "display": "destination",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.destination",
              "display": "MessageHeader.destination",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.destination` is mapped to FHIR R4B element `MessageHeader.destination` as `Equivalent`.\nThere SHOULD be at least one destination, but in some circumstances, the source system is unaware of any particular destination system."
            }
          ]
        },
        {
          "code": "MessageHeader.destination.name",
          "display": "name",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.destination.name",
              "display": "MessageHeader.destination.name",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.destination.name` is mapped to FHIR R4B element `MessageHeader.destination.name` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.destination.target",
          "display": "target",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.destination.target",
              "display": "MessageHeader.destination.target",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.destination.target` is mapped to FHIR R4B element `MessageHeader.destination.target` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.destination.target` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.destination.target` with unmapped reference targets: Device."
            }
          ]
        },
        {
          "code": "MessageHeader.destination.endpoint",
          "display": "endpoint",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.destination.endpoint",
              "display": "MessageHeader.destination.endpoint",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.destination.endpoint` is mapped to FHIR R4B element `MessageHeader.destination.endpoint` as `Equivalent`.\nThe id may be a non-resolvable URI for systems that do not use standard network-based addresses."
            }
          ]
        },
        {
          "code": "MessageHeader.enterer",
          "display": "enterer",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.enterer",
              "display": "MessageHeader.enterer",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.enterer` is mapped to FHIR R4B element `MessageHeader.enterer` as `RelatedTo`.\nThe mappings for `MessageHeader.enterer` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.enterer` with unmapped reference targets: Practitioner.\nUsually only for the request, but can be used in a response."
            }
          ]
        },
        {
          "code": "MessageHeader.author",
          "display": "author",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.author",
              "display": "MessageHeader.author",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.author` is mapped to FHIR R4B element `MessageHeader.author` as `RelatedTo`.\nThe mappings for `MessageHeader.author` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.author` with unmapped reference targets: Practitioner.\nUsually only for the request, but can be used in a response."
            }
          ]
        },
        {
          "code": "MessageHeader.receiver",
          "display": "receiver",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "relatedto"
                }
              ],
              "code": "MessageHeader.destination.receiver",
              "display": "MessageHeader.destination.receiver",
              "equivalence": "relatedto",
              "comment": "Element `MessageHeader.receiver` is mapped to FHIR R4B element `MessageHeader.destination.receiver` as `RelatedTo`.\nThe mappings for `MessageHeader.receiver` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.receiver` with unmapped reference targets: Organization, Practitioner."
            }
          ]
        },
        {
          "code": "MessageHeader.responsible",
          "display": "responsible",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.responsible",
              "display": "MessageHeader.responsible",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.responsible` is mapped to FHIR R4B element `MessageHeader.responsible` as `RelatedTo`.\nThe mappings for `MessageHeader.responsible` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.responsible` with unmapped reference targets: Organization, Practitioner.\nUsually only for the request, but can be used in a response."
            }
          ]
        },
        {
          "code": "MessageHeader.reason",
          "display": "reason",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "MessageHeader.reason",
              "display": "MessageHeader.reason",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.reason` is mapped to FHIR R4B element `MessageHeader.reason` as `Equivalent`."
            }
          ]
        },
        {
          "code": "MessageHeader.data",
          "display": "data",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "wider"
                }
              ],
              "code": "MessageHeader.focus",
              "display": "MessageHeader.focus",
              "equivalence": "wider",
              "comment": "Element `MessageHeader.data` is mapped to FHIR R4B element `MessageHeader.focus` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.data` do not cover the following types based on type expansion: display, reference.\nThe standard extension `alternate-reference` has been mapped as the representation of FHIR DSTU2 element `MessageHeader.data` with unmapped reference targets: Resource.\nThe data is defined where the transaction type is defined. The transaction data is always included in the bundle that is the full message.  Only the root resource is specified.  The resources it references should be contained in the bundle but are not also listed here.  Multiple repetitions are allowed to cater for merges and other situations with multiple focal targets."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "sourceVersion": "1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-MessageHeader.meta",
      "targetVersion": "0.1.0",
      "element": [
        {
          "code": "MessageHeader.meta",
          "display": "meta",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "Extension",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.meta` is mapped to FHIR R4B element `MessageHeader.meta` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.meta` do not cover the following types: Meta.\nThe mappings for `MessageHeader.meta` do not cover the following types based on type expansion: lastUpdated, profile, security, tag, versionId."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "sourceVersion": "1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-MessageHeader.text",
      "targetVersion": "0.1.0",
      "element": [
        {
          "code": "MessageHeader.text",
          "display": "text",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "Extension",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.text` is mapped to FHIR R4B element `MessageHeader.text` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.text` do not cover the following types: Narrative.\nThe mappings for `MessageHeader.text` do not cover the following types based on type expansion: div, status.\nContained resources do not have narrative. Resources that are not contained SHOULD have a narrative."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "sourceVersion": "1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-MessageHeader.timestamp",
      "targetVersion": "0.1.0",
      "element": [
        {
          "code": "MessageHeader.timestamp",
          "display": "timestamp",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "Extension",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.timestamp` has a context of MessageHeader based on following the parent source element upwards and mapping to `MessageHeader`.\nElement `MessageHeader.timestamp` has no mapping targets in FHIR R4B. Typically, this is because the element has been added (is a new element)."
            }
          ]
        }
      ]
    },
    {
      "source": "http://hl7.org/fhir/StructureDefinition/MessageHeader",
      "sourceVersion": "1.0.2",
      "target": "http://hl7.org/fhir/1.0/StructureDefinition/extension-MessageHeader.source.contact",
      "targetVersion": "0.1.0",
      "element": [
        {
          "code": "MessageHeader.source.contact",
          "display": "contact",
          "target": [
            {
              "modifierExtension": [
                {
                  "url": "http://hl7.org/fhir/1.0/StructureDefinition/extension-ConceptMap.element.target.equivalence",
                  "valueCode": "equivalent"
                }
              ],
              "code": "Extension",
              "equivalence": "equivalent",
              "comment": "Element `MessageHeader.source.contact` is mapped to FHIR R4B element `MessageHeader.source.contact` as `SourceIsBroaderThanTarget`.\nThe mappings for `MessageHeader.source.contact` do not cover the following types: ContactPoint.\nThe mappings for `MessageHeader.source.contact` do not cover the following types based on type expansion: period, rank, system, use, value."
            }
          ]
        }
      ]
    }
  ]
}