This is not the current version of DocBook.
DocBook XML 4.2CR1 is available as a zip archive.
You can also retrieve the files individually if you prefer:
The DocBook XML V4.2CR1 README.
The DocBook XML DTD.
The DocBook XML DTD “information pool” module.
The DocBook XML DTD “hierarchy” module.
The DocBook XML DTD “notations” module.
The DocBook XML DTD “character entities” module.
The DocBook XML DTD “general entities” module.
An XML version of the SGML Open CALS Table model.
The OASIS Open XML Exchange Table model. This is an alternate table model for the XML version of DocBook.
An OASIS catalog for the DocBook XML DTD.
An OASIS XML Catalog for the DocBook XML DTD.
The CVS ChangeLog for DocBook V4.2CR1.
The ent/ directory contains unofficial XML versions of the ISO entity sets. In the future, these files will be distributed separately as part of the XML Character Entities distribution.