Cross-Version Extension for Task.reason in R3

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 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..	CodeableConcept
url				"http://hl7.org/fhir/3.0/StructureDefinition/extension-Task.reason"
Documentation for this format

{
  "resourceType" : "StructureDefinition",
  "id" : "xv-r3-tsk.reason",
  "url" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-Task.reason",
  "name" : "XVerExtensionTask.reasonR3",
  "title" : "Cross-Version Extension for Task.reason in R3",
  "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.reason. Valid in versions R2, 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" : "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 description or code indicating why this task needs to be performed.",
      "comment" : "This should only be included if there is no focus or if it differs from the reason indicated on the focus.",
      "min" : 0,
      "max" : "1",
      "isModifier" : false,
      "mapping" : [{
        "identity" : "workflow",
        "map" : "Request.reasonCode, Event.reasonCodeableConcept"
      },
      {
        "identity" : "rim",
        "map" : ".reasonCode"
      },
      {
        "identity" : "w5",
        "map" : "why"
      }]
    },
    {
      "path" : "Extension.extension",
      "max" : "0"
    },
    {
      "path" : "Extension.value[x]",
      "min" : 1,
      "type" : [{
        "code" : "CodeableConcept"
      }]
    },
    {
      "path" : "Extension.url",
      "fixedUri" : "http://hl7.org/fhir/3.0/StructureDefinition/extension-Task.reason"
    }]
  }
}