{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "The first concept is at a more detailed level than the second concept.  For example, Pennicillin G is narrower than Pennicillin, and vellus hair is narrower than hair.  Narrower than is the opposite of broader than.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-MapRelationship",
  "property" : [ ],
  "codesystem" : "20891596-61f5-55ef-ae44-b220d3cdf9e4",
  "concept_id" : "448f806c-46f6-5fe8-84f0-15c1983d52c8",
  "ancestors" : {
    "NT" : 0
  },
  "id" : "558ba8e6-b259-4a7d-bca1-57fd2f5a8fb6",
  "code" : "NT",
  "display" : "Narrower Than",
  "version" : "2018-08-12"
}