[
  {
    "key": "LOC",
    "type": "doc_subjects",
    "text": "Loc"
  },
  {
    "key": "UDC",
    "type": "doc_subjects",
    "text": "UDC"
  },
  {
    "key": "DEWEY",
    "type": "doc_subjects",
    "text": "Dewey"
  },
  {
    "key": "ICS",
    "type": "doc_subjects",
    "text": "ICS"
  }
]
