{
  "package" : "hl7.terminology.r4@6.3.0",
  "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" : [ {
    "_uri" : "http://hl7.org/fhir/concept-properties#status",
    "code" : "status",
    "valueCode" : "active"
  }, {
    "_uri" : "http://terminology.hl7.org/CodeSystem/utg-concept-properties#v3-internal-id",
    "code" : "internalId",
    "valueCode" : "10707"
  } ],
  "codesystem" : "64fc68e1-d6cc-5327-856f-660b997663fb",
  "concept_id" : "2c8359aa-6d26-522a-9507-a3ec0e6779db",
  "ancestors" : {
    "HS" : 0
  },
  "id" : "72be5936-fccb-47e8-ab1a-c94b3afe8992",
  "code" : "HS",
  "display" : "HS",
  "version" : "3.0.0"
}