> Of course, if I could load XQuery modules in an XSLT context 
> and then use the functions defined in those modules from 
> XPath expressions used in my XSLT transform that could be 
> very handy. 

In Saxon, you can.

http://www.saxonica.com/documentation/extensions/instructions/import-query.h
tml

Michael Kay
http://www.saxonica.com/