The connection identifier is named 263F7719-7EBD7F27-38024A96-0D60BCA5-84653937. 
                        The type of the connection file is EXCEL_OOXML. 
                        The handle of the request is 1 because the GetFileTableFields method applies at app level.
                        The client sends:
                        {
  "jsonrpc": "2.0",
  "id": 7,
  "method": "GetFileTableFields",
  "handle": 1,
  "params": [
    "263F7719-7EBD7F27-38024A96-0D60BCA5-84653937",
    "Qv101.xlsx",
    {
      "qType": "EXCEL_OOXML"
    },
    "Categories"
  ]
}
                        The engine returns:
                        {
  "jsonrpc": "2.0",
  "id": 7,
  "result": {
    "qFields": [
      {
        "qName": "CategoryID"
      },
      {
        "qName": "CategoryName"
      }
    ],
    "qFormatSpec": "(ooxml, embedded labels, table is Categories)"
  }
}
                        The table Categories contains two fields: CategoryID and CategoryName.