Extensible Program Call Markup Language (XPCML) enhances the functionality and usability of the Program Call Markup Language (PCML) by offering support for XML schemas. XPCML does not support serialization, so unlike PCML, you cannot serialize an XPCML document.
However, XPCML offers several valuable enhancements when compared to PCML:
For more information about XPCML, see the following pages: