I don't know much about edit modes, so I may be wrong, but the BACK_TO_XML ruleset is declared but not referenced anywhere in the maven and tld edit modes.
Contrary to this, in ant mode, it is referenced, to get back from SQL to XML rules.
So I think the BACK_TO_XML ruleset should be removed in maven & tld modes.
More generally, would it not be interesting to check for unused sections in our edit modes ?
I'm thinking of an XSL transformation to run on the edit modes directory...