{
  "description": "A proper value is applicable, but not known.",
  "compose": {
    "include": [ {
      "filter": [ {
        "op": "is-a",
        "value": "UNK",
        "property": "concept"
      } ],
      "system": "http://terminology.hl7.org/CodeSystem/v3-NullFlavor"
    } ]
  },
  "_filename": "ValueSet-v3-Unknown.json",
  "package_name": "hl7.terminology",
  "date": "2014-03-26",
  "publisher": null,
  "name": "Unknown",
  "type": null,
  "experimental": null,
  "resourceType": "ValueSet",
  "title": "Unknown",
  "package_version": "3.1.0",
  "status": "active",
  "language": "en",
  "id": "f8690903-edb9-400e-9256-34e15aa2903c",
  "kind": null,
  "url": "http://terminology.hl7.org/ValueSet/v3-Unknown",
  "identifier": [ {
    "value": "urn:oid:2.16.840.1.113883.1.11.10612",
    "system": "urn:ietf:rfc:3986"
  } ],
  "version": "2.0.0"
}