Hi Gui, I have been working with PsychoPath's document and source code for a while, PsychoPath does not support enough user interface for Xalan to get all the necessary things such as get XPath syntax tree.
But merging Xalan and PsychoPath and use PsychoPath as our org.apache.xpath package replacing solution for Xalan is feasible, It will save much time for us In fact, i have done some experiment merging job Regards Victor Wang