This framework has been written for the Velocity documentation and we also tried to do a reasonably good job in documentating it.
In any case, the last and final word is in the Subversion
repository for the DocBook Framework at
The reference on how to setup and build documentation is the
Velocity documentation at
http://svn.apache.org/repos/asf/velocity/docs/ and also the
DocBook Framework documentation itself which is located in the
docs/ subfolder of the distribution. If in doubt,
please check there on how the framework is used.