I'm playing around with XStreamDB, and am really impressed with it so far. Relatively fast queries, doing stuff that would bring our current metadata database to its knees.
One thing I'm realizing is that I'm a complete dumb newbie when it comes to XQuery. Sure, I understand some of the concepts, but implementing the queries and the syntax etc... is a bit much right now. I'm working on that, to be sure, but there seems to be a big gaping hole on the 'net (and the bookstore) on decent, usable XQuery documentation.
Sure, there's the W3C language spec. but who really reads that (or, if you read it, do you really understand it?)
Has anyone come across some comprehensive, well-thought-out, and practical XQuery guide/documentation?
Here's all I've come across: