The latest version of DocBook NG, based on the Relax NG grammar, has been released by Norm Walsh at: http://docbook.org/docbook-ng/jagermeister/index.html
Changes in this release include:
for simple equations.
for inline term definitions.
- The constraints on spanname, colname, namest, and nameend where tightened.
Norm will also be creating a Simplified DocBook NG release, also based on Jägermeister! I'll follow up with a post when it is available.
Good work, Norm!
See also: DocBook