> Any pointers on where to find out more about how to use idiv, mod, 
> etc.?  I'd like to get a better sense of the basics: the logic that 
> explains how the above works (e.g. what's going on with the "div 100" 
> that gives me the last two digits, what does mod do, etc.). The xpath 
> 2.0 spec isn't all that helpful for me.
> 

You might find that the explanation in my "XPath 2.0 Programmer's Reference"
is easier to follow than the W3C spec (which does rather require you to
chase cross-references between different documents).

http://www.amazon.com/exec/obidos/asin/0764569104/

Michael Kay