Starting from version 7 Vim supports context aware completion of XML files (and others). In particular, when the file being edited is an XML file, completion can be driven by the grammar extracted from a Document Type Definition (DTD).
For this feature to work the user should put an XML data file corresponding to the desired DTD in a autoload/xml directory contained in a directory belonging to Vim's 'runtimepath' (for example ~/.vim/autoload/xml/).
dtd2vim is the program that creates XML data files from DTDs. Given as input a DTD file.dtd it will create a file.vim XML data file. dialectname will be part of dictionary name and will be used as argument for the :XMLns command.
vim (1).
In the Vim online help: :help compl-omni, :help ft-xml-omni, :help :XMLns.
dtd2vim is fully documented in /usr/share/doc/vim-scripts/html/dtd2vim.html.
This manual page was written by Stefano Zacchiroli <zack@debian.org> for the Debian(TM) system (but may be used by others). Permission is granted to copy, distribute and/or modify this document under the terms of the GNU General Public License, Version 2 any later version published by the Free Software Foundation.
On Debian systems, the complete text of the GNU General Public License can be found in /usr/share/common-licenses/GPL.
Stefano Zacchiroli