Check out some options how sdr files might be converted to xls format.
SmartDraw visual processor allows export of its drawings (.sdr) to several other formats, including spreadsheets from Microsoft Excel (.xlsx, .xls). This is done through a direct link between SmartDraw and Office programs, which means that you can directly transfer .sdr drawing to open Excel spreadsheet and save it, essentially achieving sdr to xls conversion in the process.
Unfortunately, there is no detailed software record in the database for this conversion.
Additional links: Open sdr file, Open xls file
SDR
Files with sdr extension can mostly be found as drawings created using SmartDraw software that is used for making high quality presentations, charts or graphs.
An sdr file extension is related to the Dell support files found in Dell computers.
Files with sdr file extension might also be found as saved reminders for Smart Diary Suite.
An sdr file extension is related to the QuickView Pro for DOS soundcard drivers. Probably obsolete.
Files with sdr extension may also be data output files saved and processed from Sokkia solutions.
XLS
Files with xls extension are best known as spreadsheets from Microsoft Excel. A spreadsheet is basically a grid of cells sorted in rows and columns. Each cell can contain text, numeric or formula data. Excel XLS spreadsheets can be opened in most other similar programs, such as OpenOffice.org Calc.
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