HitSOFTWARE claims their jAllora product to be a relational-to-xml mapper (and vice versa). Geert Clememsen from Frontbase just sent a message saying it works with the FrontBase database server.
Sounds interesting. Didn’t see any claims of XQuery support though (the closest they come to mentioning support is in this white paper, which doesn’t come right out and say they support it, only that they should). Will have to dig deeper. It’s also a little pricey. It’s good that it’s java, and has lots of tools, but it’s bad that it requires a separate webservice provider to manage/interact with it (ala Tamino) - an integrated solution like XStreamDB would be nicer for our needs.
One more product to add to the list for further study…