This format was created to store images in RAW format that were created using Epson digital cameras. The image is stored in an uncompressed form, and it can be directly printed on Epson printers. This format can be edited using the Epson PhotoRAW software or using plug-ins in other image editors.
The SXW file format was originally created for StarOffice Writer, the word processing application for Sun Microsystem's StarOffice suite. Programs that can open SXW files include StarOffice Writer and OpenOffice.org Writer. To open an SXW file in Microsoft Word, it's usually possible by renaming it as a DOC file.