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{
  "type": "object",
  "properties": {
    "name": {
      "type": "string"
    },
    "subjectId": {
      "type": [
        "string",
        "null"
      ],
      "x-ref-type": "Subject"
    },
    "description": {
      "type": [
        "string",
        "null"
      ]
    }
  },
  "description": "A disciplinary sub-category (finer-grained than Subject), derived from preprint records."
}