Several document formats in the past used sdw extension for their files, including Lotus WordPro and certain versions of OpenOffice,org. Some word processing software still support these file types and can re-save them to a doc format used in Microsoft Word.
Found 2 different conversion types using the same filename extensions.
Conversion sdw to doc type 1:
Convert from Lotus WordPro drawing file to Microsoft Word document (prior version 2007).
Microsoft Windows software - convert sdw to doc on Windows
A free word processing program, part of GNOME office productivity bundle
File type (from-> to)
Convert from sdw file format
Lotus WordPro drawing file
Microsoft Word document (prior version 2007)
The tables with software actions are a good pointer for what a certain program does with various file types and often may give users a good hint how to perform certain file conversion, for example the above-mentioned sdw to doc. However, it is not perfect and sometimes can show results which are not really usable because of how certain programs work with files and the possible conversion is thus actually not possible at all.
Conversion sdw to doc type 2:
Convert from OpenOffice.org text document to Microsoft Word document (prior version 2007).
Apple macOS / Mac OS X software - convert sdw to doc on OS X
A full-featured set of office applications for Mac OS X
Multiplatform software - convert sdw to doc on any platform
Full-featured word processing and desktop publishing tool from LibreOffice suite
Word processor and text editor from OpenOffice.org suite