FAQ - even referred to in a question on the same page as this question.
I'm sorry, I am not sure what you mean.
Can you be more specific?
I think Adrian means this FAQ: http://wiki.jboss.org/wiki/FAQJBossJCA
One of the FAQ entries points here: http://wiki.jboss.org/wiki/IWantToPluginACustomThirdpartyDataSource
And that entry points to: http://wiki.jboss.org/wiki/DSdotXML (look at the xa-datasouce example)