The flag indicating whether column names are obtained from the first extracted row of a document table. Defaults to False.
If column names are not set to be obtained from the first extracted row of a document table, default column names are used instead. For spreadsheet file formats, default column names are A, B, C, … Z, AA, AB, and so on. For other file formats, default column names are Column1, Column2, Column3, and so on.