{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Information is not available at this time (with no expectation regarding whether it will or will not be available in the future).",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-NullFlavor",
  "property" : [ {
    "code" : "child",
    "valueCode" : "NAV"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "UNK"
  } ],
  "codesystem" : "6f819d30-3400-5f76-8b7a-ac265f94fe3b",
  "concept_id" : "2c55b285-1c50-57b5-af01-4de2a4ad6b4a",
  "ancestors" : {
    "NI" : 2,
    "UNK" : 1,
    "NAVU" : 0
  },
  "id" : "7b5556ec-4bc3-45e8-b2b0-aaba3188ae8c",
  "code" : "NAVU",
  "display" : "Not available",
  "version" : "2018-08-12"
}