advanced sorting (order-by)

Hmm, can you do more advanced sorting using order-by,using eval or
something. I have an xml structure where I want it to sort by an an average
rating that should
be calculated on the fly. I guess I could run it through a xsl stylesheet
first and and add an average rating element,
then use  it for sorting. Something like eval in the order-by parameter
seems more practical though... anyone?


------------------
Mattias  Konradsson



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