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Narrative

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Generated Narrative: StructureDefinition ext-R4-Task.reasonReference

Name	Flags	Card.	Type	Description & Constraints
Extension		0..1	Extension(5.0.0)	R4: Why task is needed (new)
url		1..1	uri	"http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"
value[x]		0..1	Reference(Cross-version Profile for R4.Resource for use in FHIR R5(0.1.0) | Resource)	Why task is needed
Documentation for this format

Source1

{
  "resourceType": "StructureDefinition",
  "id": "ext-R4-Task.reasonReference",
  "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-r4.r5"
        },
        {
          "url": "version",
          "valueString": "0.1.0"
        },
        {
          "url": "uri",
          "valueUri": "http://hl7.org/fhir/uv/xver/ImplementationGuide/hl7.fhir.uv.xver-r4.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-r4.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-r4.r5"
          }
        ]
      }
    }
  ],
  "url": "http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference",
  "version": "0.1.0",
  "name": "ExtensionTask_ReasonReference",
  "title": "R4: Why task is needed (new)",
  "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": "R4: `Task.reasonReference` (new:Reference(Resource))",
  "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 `Task.reasonReference` as defined in FHIR R4\r\nin FHIR R5.\r\n\r\nThe source element is defined as:\r\n`Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`\r\n\r\nAcross FHIR versions, the element set has been mapped as:\r\n*  R4: `Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`\n*  R4B: `Task.reasonReference` 0..1 `Reference(http://hl7.org/fhir/StructureDefinition/Resource)`\r\n\r\nFollowing are the generation technical comments:\r\nElement `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.\nElement `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).",
  "fhirVersion": "5.0.0",
  "mapping": [
    {
      "identity": "rim",
      "uri": "http://hl7.org/v3",
      "name": "RIM Mapping"
    }
  ],
  "kind": "complex-type",
  "abstract": false,
  "context": [
    {
      "type": "element",
      "expression": "Task"
    }
  ],
  "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": "R4: Why task is needed (new)",
        "definition": "R4: `Task.reasonReference` (new:Reference(Resource))",
        "comment": "Element `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.\nElement `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nTasks might be justified based on an Observation, a Condition, a past or planned procedure, etc.   This should only be included if there is no focus or if it differs from the reason indicated on the focus.    Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text.",
        "min": 0,
        "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/4.0/StructureDefinition/extension-Task.reasonReference",
        "isModifier": false,
        "isSummary": false,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Why task is needed",
        "definition": "A resource reference indicating why this task needs to be performed.",
        "comment": "Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc.   This should only be included if there is no focus or if it differs from the reason indicated on the focus.    Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/4.0/StructureDefinition/profile-Resource|0.1.0",
              "http://hl7.org/fhir/StructureDefinition/Resource|5.0.0"
            ]
          }
        ],
        "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,
        "mapping": [
          {
            "identity": "rim",
            "map": "N/A"
          }
        ]
      }
    ]
  },
  "differential": {
    "element": [
      {
        "id": "Extension",
        "path": "Extension",
        "short": "R4: Why task is needed (new)",
        "definition": "R4: `Task.reasonReference` (new:Reference(Resource))",
        "comment": "Element `Task.reasonReference` has a context of Task based on following the parent source element upwards and mapping to `Task`.\nElement `Task.reasonReference` has no mapping targets in FHIR R5. Typically, this is because the element has been added (is a new element).\nTasks might be justified based on an Observation, a Condition, a past or planned procedure, etc.   This should only be included if there is no focus or if it differs from the reason indicated on the focus.    Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text.",
        "min": 0,
        "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/4.0/StructureDefinition/extension-Task.reasonReference"
      },
      {
        "id": "Extension.value[x]",
        "path": "Extension.value[x]",
        "short": "Why task is needed",
        "definition": "A resource reference indicating why this task needs to be performed.",
        "comment": "Tasks might be justified based on an Observation, a Condition, a past or planned procedure, etc.   This should only be included if there is no focus or if it differs from the reason indicated on the focus.    Use the CodeableConcept text element in `Task.reasonCode` if the data is free (uncoded) text.",
        "min": 0,
        "max": "1",
        "base": {
          "path": "Extension.value[x]",
          "min": 0,
          "max": "1"
        },
        "type": [
          {
            "code": "Reference",
            "targetProfile": [
              "http://hl7.org/fhir/4.0/StructureDefinition/profile-Resource|0.1.0",
              "http://hl7.org/fhir/StructureDefinition/Resource|5.0.0"
            ]
          }
        ]
      }
    ]
  }
}