{
  "package" : "hl7.fhir.r4.core@4.0.1",
  "definition" : "Description: Prior to beginning a regular period of extended sleep (this would exclude naps).  Note that this might occur at different times of day depending on a person's regular sleep schedule.",
  "system" : "http://terminology.hl7.org/CodeSystem/v3-TimingEvent",
  "property" : [ ],
  "codesystem" : "2afa1e66-a739-5d35-b9a6-a20f283e8bc4",
  "concept_id" : "2c8359aa-6d26-522a-9507-a3ec0e6779db",
  "ancestors" : {
    "HS" : 0
  },
  "id" : "b454c125-35d3-4949-8be5-05cdc2daaa66",
  "code" : "HS",
  "display" : "HS",
  "version" : "2018-08-12"
}