http://hl7.org/fhir/ex-onsettype|4.0.1

{
  "description" : "This value set includes example Onset Type codes which are used to identify the event for which the onset, starting date, is required.",
  "compose" : null,
  "package" : "hl7.fhir.r4.core@4.0.1",
  "date" : null,
  "meta" : {
    "profile" : [ "http://hl7.org/fhir/StructureDefinition/shareablecodesystem" ],
    "lastUpdated" : "2019-11-01T09:29:23.356+11:00"
  },
  "publisher" : "Financial Management",
  "content" : "complete",
  "name" : "ExampleOnsetType(Reason)Codes",
  "copyright" : "This is an example set.",
  "experimental" : false,
  "resourceType" : "CodeSystem",
  "title" : "Example Onset Type (Reason) Codes",
  "supliment" : null,
  "status" : "draft",
  "id" : "cf845214-cf9f-5de2-84e9-82bc58b41583",
  "valueSet" : "http://hl7.org/fhir/ValueSet/ex-onsettype",
  "url" : "http://hl7.org/fhir/ex-onsettype",
  "identifier" : [ {
    "value" : "urn:oid:2.16.840.1.113883.4.642.4.579",
    "system" : "urn:ietf:rfc:3986"
  } ],
  "concept" : [ {
    "code" : "lxm",
    "display" : "Last Exam",
    "definition" : "Date of last examination."
  }, {
    "code" : "sym",
    "display" : "Start of Symptoms",
    "definition" : "Date when symptoms were first noticed."
  }, {
    "code" : "lmn",
    "display" : "Last Menstruation",
    "definition" : "Start date of last menstruation."
  } ],
  "caseSensitive" : true,
  "version" : "4.0.1",
  "contact" : [ {
    "telecom" : [ {
      "value" : "http://hl7.org/fhir",
      "system" : "url"
    } ]
  } ]
}