On the one hand, I think users would greatly benefit from having things like document('xmldb://whatever/query') "just work" from within XSLT and XPathScript stylesheets, but I can't help thinking that we'd be opening a real can of worms for ourselves in terms of managing the various callback interfaces between Language modules and whatever scheme handlers we might create. I don't find custom Providers hard to write, and if I don't want URLs for "internal" data URLs to be visible to the public, then, well, I simply don't mention/link to them in the contents of the site... *shrug*
-kip
