P comes preconfigured for XML4J 1.1.x. Please see DOM Package Support for information on using other XML parsers. P already supports OpenXML, it's just not preconfigured for it. I will be updating the build frequently until the Working Draft has been completely implemented. Enhancements and bug fixes will also be incorporated as I can get to them.
P is free.
The Copyright owner will not be liable for any damages suffered by you as a result of using the Program. In no event will the Copyright owner be liable for any special, indirect or consequential damages or lost profits even if the Copyright owner has been advised of the possibility of their occurrence. I got the inspiration for the processor from Sean Russell's Docproc back in mid 1998. Without Docproc I probably never would have started using XSL at such an early stage. I fixed bugs, added functionality, and I did my best at optimizing.