More specifically, a program that can open the .oxps file is not installed on the computer. Note The .oxps format is the default XPS document format in Windows 8. Typically, .oxps files are created when users print to a Microsoft XPS Document Writer (MXDW) printer on a computer that is running Windows 8.
This format was used for storing databases on the Pegasus and Palm PDA devices. Besides images, PDB allowed you to store tables, maps, e-books, and other data in a structured way. Today it has become obsolete and has been replaced by more flexible formats with DRM protection.