Cross-Version Extension for Task.reasonReference in R4

Context of Use

This extension may be used in the following contexts:

• element Task (For version R5)
• extension http://hl7.org/fhir/5.0/StructureDefinition/extension-Task
• element ProcessRequest (For version R3)
• extension http://hl7.org/fhir/3.0/StructureDefinition/extension-ProcessRequest
• element ProcessResponse (For version R3)
• extension http://hl7.org/fhir/3.0/StructureDefinition/extension-ProcessResponse
• element Task (For version R3)
• extension http://hl7.org/fhir/3.0/StructureDefinition/extension-Task
• element ProcessRequest (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-ProcessRequest
• element ProcessResponse (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-ProcessResponse
• element Order (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-Order
• element OrderResponse (For version R2)
• extension http://hl7.org/fhir/1.0/StructureDefinition/extension-OrderResponse

Name	Flags	Card.	Type	Description & Constraints
Extension		0..1	Extension	Why task is needed
extension		..0
value[x]		1..	Reference(Resource)
url				"http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r4-tsk.reasonReference",
  "url" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference",
  "name" : "XVerExtensionTask.reasonReferenceR4",
  "title" : "Cross-Version Extension for Task.reasonReference in R4",
  "status" : "active",
  "experimental" : false,
  "publisher" : "Health Level Seven International (Orders and Observations)",
  "contact" : [{
    "telecom" : [{
      "system" : "url",
      "value" : "http://hl7.org/fhir"
    }]
  },
  {
    "telecom" : [{
      "system" : "url",
      "value" : "http://www.hl7.org/Special/committees/orders/index.cfm"
    }]
  }],
  "description" : "Cross-Version Extension for Task.reasonReference. Valid in versions R2, R3, R5\r\n\r\nThis is a valid cross-version extension because it's counted as a new element",
  "jurisdiction" : [{
    "coding" : [{
      "system" : "http://unstats.un.org/unsd/methods/m49/m49.htm",
      "code" : "001"
    }]
  }],
  "fhirVersion" : "5.0.0",
  "kind" : "complex-type",
  "abstract" : false,
  "context" : [{
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "5.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "5.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Task"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/5.0/StructureDefinition/extension-Task"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "3.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "3.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "ProcessRequest"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-ProcessRequest"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "3.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "3.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "ProcessResponse"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-ProcessResponse"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "3.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "3.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Task"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-Task"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "ProcessRequest"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-ProcessRequest"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "ProcessResponse"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-ProcessResponse"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "Order"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-Order"
  },
  {
    "extension" : [{
      "extension" : [{
        "url" : "startFhirVersion",
        "valueCode" : "1.0"
      },
      {
        "url" : "endFhirVersion",
        "valueCode" : "1.0"
      }],
      "url" : "http://hl7.org/fhir/StructureDefinition/version-specific-use"
    }],
    "type" : "element",
    "expression" : "OrderResponse"
  },
  {
    "type" : "extension",
    "expression" : "http://hl7.org/fhir/1.0/StructureDefinition/extension-OrderResponse"
  }],
  "type" : "Extension",
  "baseDefinition" : "http://hl7.org/fhir/StructureDefinition/Extension",
  "derivation" : "constraint",
  "differential" : {
    "element" : [{
      "path" : "Extension",
      "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",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "workflow",
        "map" : "Request.reasonReference, Event.reasonReference"
      },
      {
        "identity" : "w5",
        "map" : "FiveWs.why[x]"
      },
      {
        "identity" : "rim",
        "map" : ".outboundRelationship[typeCode=RSON].target"
      }]
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "Reference",
        "targetProfile" : ["http://hl7.org/fhir/StructureDefinition/Resource"]
      }]
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/4.0/StructureDefinition/extension-Task.reasonReference"
    }]
  }
}