{
  "description": "Used to specify why the normally expected content of the data element is missing.",
  "_filename": "CodeSystem-data-absent-reason.json",
  "package_name": "hl7.fhir.core",
  "date": "2017-12-20T15:52:34+11:00",
  "meta": {
    "lastUpdated": "2017-12-20T15:52:34.818+11:00"
  },
  "publisher": null,
  "content": "complete",
  "name": "DataAbsentReason",
  "type": null,
  "experimental": "false",
  "resourceType": "CodeSystem",
  "title": null,
  "package_version": "3.2.0",
  "status": "draft",
  "id": "495145f5-04b0-43f3-bd6c-5354f8f88d40",
  "valueSet": "http://hl7.org/fhir/ValueSet/data-absent-reason",
  "kind": null,
  "url": "http://hl7.org/fhir/data-absent-reason",
  "identifier": {
    "value": "urn:oid:2.16.840.1.113883.4.642.1.6",
    "system": "urn:ietf:rfc:3986"
  },
  "concept": [ {
    "code": "unknown",
    "display": "Unknown",
    "definition": "The value is not known."
  }, {
    "code": "asked",
    "display": "Asked",
    "definition": "The source human does not know the value."
  }, {
    "code": "temp",
    "display": "Temp",
    "definition": "There is reason to expect (from the workflow) that the value may become known."
  }, {
    "code": "not-asked",
    "display": "Not Asked",
    "definition": "The workflow didn't lead to this value being known."
  }, {
    "code": "masked",
    "display": "Masked",
    "extension": [ {
      "url": "http://hl7.org/fhir/StructureDefinition/codesystem-comments",
      "valueString": "Using \"masked\" may be breach of security or confidentiality, but there are times when its use is required to support alternate workflows for gaining access to denied information."
    } ],
    "definition": "The information is not available due to security, privacy or related reasons."
  }, {
    "code": "unsupported",
    "display": "Unsupported",
    "definition": "The source system wasn't capable of supporting this element."
  }, {
    "code": "astext",
    "display": "As Text",
    "extension": [ {
      "url": "http://hl7.org/fhir/StructureDefinition/codesystem-comments",
      "valueString": "it may be linked by internal references (e.g. xml:id). This usually implies that the value could not be represented in the correct format - this may be due to system limitations, or this particular data value"
    } ],
    "definition": "The content of the data is represented in the resource narrative."
  }, {
    "code": "error",
    "concept": [ {
      "code": "NaN",
      "display": "Not a Number",
      "extension": [ {
        "url": "http://hl7.org/fhir/StructureDefinition/codesystem-comments",
        "valueString": "This is sometimes an output value from measuring devices"
      } ],
      "definition": "NaN, standing for not a number, is a numeric data type value representing an undefined or unrepresentable value."
    } ],
    "display": "Error",
    "definition": "Some system or workflow process error means that the information is not available."
  }, {
    "code": "not-performed",
    "display": "Not Performed",
    "definition": "The value is not available because the observation procedure (test, etc.) was not performed."
  } ],
  "caseSensitive": true,
  "version": "3.2.0"
}