{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The are no known applicable values in this context.",
  "system" : "http://terminology.hl7.org/CodeSystem/special-values",
  "property" : [ ],
  "codesystem" : "e12173a6-0238-5e78-9905-e9e2bc36ec2e",
  "concept_id" : "7fa8010a-e84e-5c5d-8871-a2a1b0b2166c",
  "ancestors" : {
    "nil-known" : 0
  },
  "extension" : [ {
    "url" : "http://hl7.org/fhir/StructureDefinition/codesystem-concept-comments",
    "valueString" : "The existence of this subject to review"
  } ],
  "id" : "6f8a9fa6-6191-442c-96b1-03cd094b3c27",
  "code" : "nil-known",
  "display" : "Nil Known",
  "version" : "4.0.1"
}