Support for SpreadsheetML (Excel 2003 XML format) - Community / GemBox.Spreadsheet Feature Request - GemBox Support Center
In order for this module to be more Excel compliant, I suggest adding the 2003 XML format, SpreadsheetML (https://en.wikipedia.org/wiki/SpreadsheetML) to readable formats.
Comments (2)
No, this feature request is still not completed.
Also, we currently do not have plans for it so I'm afraid it will not be available in near future.
Nevertheless, please feel free to vote for it in order to increase its priority.
Regards,
Mario