Disclaimer: this is incomplete and work in progress, please report problems.
Warning
People normally don't need to directly hack the stylesheets sources.
You can find official releases at the DocBook Project file-release area at SourceForge
- Numerous Linux distributions also provide docbook-xsl packages that you can install using their package-management systems
So-called "snapshots" are automatically built each time a change is checked in; the snapshot builds are available from http://docbook.sourceforge.net/snapshots/
If you need to customize them, simply check DocBookXslStylesheetDocs
Build instructions
For instructions, see README.BUILD.
DocBook Wiki