Autodesk DWF was specifically developed by Autodesk as a file format for architects, engineers, and GIS professionals to share 2D- and 3D- design data. DWF files are highly compressed and retain detailed design information and scale. The newest version of the DWF file format, DWFx, is based on the XML Paper Specification (XPS) from Microsoft. DWFx files can be opened and printed instantly using the free Microsoft XPS Viewer. Unlike DWF files, DWFx files include additional information to display design data in the Microsoft XPS Viewer. As such, DWFx files are larger than corresponding DWF files.