Hi,

I just ran into an interesting situation, where I was not able to write 
an xpath expression doing what I want it to. Mabe someone here can help 
me ... I hope ;)

Here a sample xml-file I want to do the query on:
<?xml version="1.0" encoding="UTF-8"?>
<cart>
	<product count="2" price="10.00" id="sdkjfhdaf-A"/>
	<product count="1" price="10.00" id="sdkjfhdaf-A"/>
	<product count="1" price="30.00" id="sdkjfhdaf-B"/>
	<product count="4" price="12.50" id="sdkjfhdaf-C"/>
	<product count="2" price="16.00" id="sdkjfhdaf-A"/>
	<product count="3" price="119.00" id="sdkjfhdaf-C"/>
	<product count="2" price="13.99" id="sdkjfhdaf-A"/>
	<product count="10" price="12.34" id="sdkjfhdaf-B"/>
	<product count="3" price="11.00" id="sdkjfhdaf-B"/>
	<product count="1" price="1.00" id="sdkjfhdaf-A"/>
</cart>

I would like to test, if the total price for all products in the cart 
which have an Id containing "-C" in their id-attribute is biger than 
lets say 100.
I have no problem selecting either the price or count attribute of these 
but I am unable to get "price * count".
Any suggestions?

I created a workaround by adding an additional total-attribute and 
everything is working fine, it's just my scientiffic curiosity ;)

Chris