Táto diskusia PDF versus docx je úplne mimo pretože sú to dva formáty súborov určené na úplne niečo iné. Odpoveďou Microsoftu na PDF je formát XPS (XML Paper Specification).
Like Adobe's PDF format, XPS is a fixed-layout document format[4] designed to preserve document fidelity, so that documents look the same and as they are intended on any device. PDF is based on PostScript whereas XPS is based on XML. XPS is also the spool file format for printers, like PostScript is. Owing to such similarities, XPS is viewed as a potential competitor to PDF. However, PDF includes dynamic capabilities not supported by the XPS format, and will not be replaced by XPS when such capabilities are needed.[5]
Microsoft has submitted the XPS specification to the ISO.[6]