Convert sxw to exr

What is the difference between .sxw and .exr?

Description: The SXW file format is associated with StarOffice Writer, a word processing application that was part of the StarOffice suite developed by Sun Microsystems. The SXW file type was primarily used to save text documents that could include formatted text, images, tables, and other document elements. StarOffice served as a precursor to the more widely known OpenOffice.org suite, which later evolved into Apache OpenOffice and LibreOffice, among others.; Raster image stored in the OpenEXR format, a high dynamic-range (HDR) image file format developed by Industrial Light & Magic; supports multi-layer images, lossy and lossless compression, and 16-bit and 32-bit pixels; used for storing deep raster images for high-quality graphics; used by raster graphics editing programs and imaging applications.