{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Description:Patient exhibits a mild reaction to the challenge agent.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-ObservationValue",
  "property" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#parent",
    "code" : "parent",
    "_implicit" : true,
    "valueCode" : "_AllergyTestValue"
  } ],
  "codesystem" : "ec013d25-2aca-5859-85ca-8417fa535d67",
  "concept_id" : "cd2d760a-c8f0-5973-b720-6be34e04f16e",
  "ancestors" : {
    "A2" : 0,
    "_AllergyTestValue" : 1
  },
  "id" : "f7a2e3c0-1d53-46ea-a543-4542183cc869",
  "code" : "A2",
  "display" : "mild reaction",
  "version" : "2018-08-12"
}