What is an .oxps file?
 

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.

The OpenXPS (.oxps) format is the same as the XPS format, except that OpenXPS has been standardized as an open format by Ecma International, a standards organization.