"Explaining Xalan execution", in full detail, would be a small book. Even a "principles of operations" document would be nontrivial... though perhaps worth having, if someone had the time to work on it. At that level, the answer is "Yes, someone can and should, but someone has to come up with the funding so they can afford to take the time to do it -- or has to find a really dedicated volunteer."
Right now, what we've got is the javadocs, the code, the archives of this mailing list, and I would guess some papers that have been published in the past that may not reflect the current implementation. Do you have specific questions? Do you have a specific level of detail you're looking for? Are you asking about interpretive operation, compiled, or both? ______________________________________ "... Three things see no end: A loop with exit code done wrong, A semaphore untested, And the change that comes along. ..." -- "Threes" Rev 1.1 - Duane Elms / Leslie Fish (http://www.ovff.org/pegasus/songs/threes-rev-11.html)