Bob Stayton has released the fourth edition of DocBook XSL: The Complete Guide. New features include:
Those who purchased the book in the last year get a free upgrade to the new PDF version.
Norm Walsh has posted the seventh release candidate of DocBook 5.0. DocBook 5 is "a significant redesign that attempts to remain true to the spirit of DocBook." The schema is written in RELAX NG. A DTD and W3C XML Schema generated from the RELAX NG schema are also available. There's also a Schematron schema "that validates some extra-grammatical DocBook constraints. These patterns are also present directly in the RELAX NG Grammar and some validators, for example MSV, can perform both kinds of validation at the same time." This may become the final version of DocBook 5.
The DocBook Project has released version 1.0 of the DocBook Saxon extensions and the DocBook Xalan extensions.
