Much of document is release (version) specific: for example, Javadocs are specific to the release, due to changes in code and APIs (between major releases, as well as development ones).
Such documentation is available from Download page; here are some quickee links:
StaxMate is licensed under BSD. Why? Just to minimize all the hassle, what with alleged incompatibilities all around. Share and Enjoy!
That's all folks! Time to go Home?