integration with other products

[roger . day]

I'm about to embark on integrating Xalan with one of our products (yes, I've
read the licence agreement and we will be adhering to it) and I was wondering if
there were any FAQs/advice on the topic anywhere.

We currently use the expat parser; at some stage it would be nice to use the
same parser for xalan. How easy would this be to do?

Roger