Well, since I can't seem to delete my topic, I thought I'd document the answer I found shortly after posting my question: The answer is in a demo on the oxygen site: http://www.oxygenxml.com/demo/DocbookCustomization/docbookCustomization.html In my (meager) defense, this cool stuff wasn't mentioned ...

I'm writing DocBook documents, processing to PDF using FOP (and XEP's trial), using oXygen. For one document, I'd like to use the information in Bob Stayton's DocBookXSL book about customizing the font sizes for headings. My question is: where/how do I make these customizations? Do I create a new XS...