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I am trying with Saxon but I do not find any good examples...
I can give you a complete working demo with null xml document. It tests xpath 2.0 specific suppoted function. I would expect you say "good". It still takes effort to do
test or anything at all for that matter.
[0] Add saxon9j.jar and saxon9.jar and saxon9-xpath.jar. (Or some other version, if applicable.)
[1] Only one specific saxon related import statement you need to add (among other according to need.)
(Not even need if you tolerate writing out the full package.)
[2] This is the method to be called upon in the test program.