DocBook XSL stylesheets

the most used tool for processing DocBook documents

support many output formats: HTML/XHTML, chunked HTML/XHTML, print (PDF, RTF, PS, …), HTML Help, Java Help, Eclipse Help, man pages, WordML

work with any XSLT compliant XSLT processor

with several processors (e.g. Saxon) stylesheets provide more sophisticated output utilizing extensions

http://docbook.sourceforge.net