Docbook44 is a project mainly written in Vim Script, it's free.
DocBook 4.4 vim7 xml data file
This is a mirror of http://www.vim.org/scripts/script.php?script_id=1463
Data file for Vim7 omnicompletion. Unzip and place in ~/.vim/autoload/xml directory. Completion will be available after
:XMLns docbook44
command.