{

"resourceType": "ValueSet",
"id": "yesnodontknow",
"url": "http://hl7.org/fhir/ValueSet/yesnodontknow",
"version": "4.0.1",
"name": "Yes/No/Don't Know",
"status": "draft",
"description": "For Capturing simple yes-no-don't know answers",
"compose": {
  "include": [
    {
      "valueSet": [
        "http://terminology.hl7.org/ValueSet/v2-0136"
      ]
    },
    {
      "system": "http://terminology.hl7.org/CodeSystem/data-absent-reason",
      "concept": [
        {
          "code": "asked-unknown",
          "display": "Don't know"
        }
      ]
    }
  ]
},
"expansion": {
  "identifier": "urn:uuid:bf99fe50-2c2b-41ad-bd63-bee6919810b4",
  "timestamp": "2015-07-14T10:00:00Z",
  "contains": [
    {
      "system": "http://terminology.hl7.org/CodeSystem/v2-0136",
      "code": "Y",
      "display": "Yes"
    },
    {
      "system": "http://terminology.hl7.org/CodeSystem/v2-0136",
      "code": "N",
      "display": "No"
    },
    {
      "system": "http://terminology.hl7.org/CodeSystem/data-absent-reason",
      "code": "asked-unknown",
      "display": "Don't know"
    }
  ]
}

}