Here's an interesting blog about XSLT. I stand by my decision on XSLT. XSLT is good for transformations, not processing. A sort is a kind of processing, so is grouping - so naturally they are complex to describe in a transformation language. [Spotted in The Fishbowl>http://fishbowl.pastiche.org/2003/11/02/an_xslt_anecdote]