Thanks, Jenda. I had a play with your module. It's quite interesting and pretty fast.

At the moment, I've been playing with XSLT, which I started learning a few years ago but stopped using it. It's performing very fast too, so I'm going to go down that road for now.

But that you very much for your suggestions - I've created some working test scripts based on your code - and I'll look into XML::Rules when I'm back in the XML world again :-)