I'm please to report two new Candidate Releases for DocBook today!
I've been doing a fair amount of testing and customization layers around Simplified DocBook 1.1. If you find any problems, please let Norm or I know.
For my customization layers, I've been using Tatu Saloranta's dtdflatten to create a flattened version, validating the DTD with Kohsuke Kawaguchi's msv (multischema validator), and then compiling it for use in Arbortext Epic (use the compile_doctype in the editor's command-line interface).
I'm also having fun trying to create my customization layer in Relax NG, based on the Simplified DocBookNG "Bourbon" release.
If schemas are making you work too hard, you need to be RelaxNG! :-)
See also: DocBook