[derickson]

Using an XML native NoSQL database is a game changer when consuming XML and producing XML HTTP APIs. A good XQuery engine makes many of the problems people are listing about XML simply go away.

I like @mnot's point about providing "excellent client bindings" in common languages.

[mindcrime]

What DB do you like for storing and querying XML? I've been using eXistDB lately, but I'd be curious to hear if people are finding something else to be better.