Topic: xml test case

Hi,

I'm trying to stress test a web server.At the moment I've defined a very simple test case:
<case>
<url>http://www.ubuntu.sur.ac.uk/oscommerce</url>
</case>

This will request the webpage in /var/www dir....I wish to test something more complex,bur unable to define any test case due to my lack of xml knowledge...Could anyone help me with a test case that would browse a catalog in an ecommerce site or even better complete a transaction(website with a shopping cart s/w)...that would give me a proper test than just accessing the index page

cheers

David