{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Information was sought but not found (e.g., patient was asked but didn't know)",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-NullFlavor",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#child",
    "code" : "child",
    "_implicit" : true,
    "valueCode" : "NAV"
  }, {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "UNK"
  } ],
  "codesystem" : "6f819d30-3400-5f76-8b7a-ac265f94fe3b",
  "concept_id" : "da86739d-6a37-55ac-86cf-2eb9efa5ac21",
  "ancestors" : {
    "NI" : 2,
    "UNK" : 1,
    "ASKU" : 0
  },
  "id" : "bdefc390-b3e4-48f0-a2dc-ef9c915c04cd",
  "code" : "ASKU",
  "display" : "asked but unknown",
  "version" : "2018-08-12"
}