{
  "version": 1,
  "fields": {
    "id": {"type": "string", "required": true},
    "tokens": {"type": "integer", "required": true, "min": 0, "max": 8192},
    "split": {"type": "string", "required": true, "enum": ["train", "test"]}
  },
  "unique": ["id"],
  "min_rows": 1,
  "allow_extra": false
}