This manual is quite outdated and there is an effort to fix it on the debian-doc mailing list. See the current draft of the new policy.
Here is a list of decisions that were made on our mailing list and
approved by our Documentation Manager, Susan G. Kleinmann.
Filesystem:
/usr/share/doc/manuals/somemanual/index.html /usr/share/doc/manuals/somemanual.ps.gz (optional)
WWW server:
http://www.debian.org/doc/manuals/somemanual/
FTP server:
http://ftp.debian.org/debian/doc/manuals/somemanual.html.tar.gz http://ftp.debian.org/debian/doc/manuals/somemanual.text.gz http://ftp.debian.org/debian/doc/manuals/somemanual.dvi.gz http://ftp.debian.org/debian/doc/manuals/somemanual.ps.gz http://ftp.debian.org/debian/doc/manuals/somemanual.sgml.tar.gz
Please note that this part of the policy hasn't been universally
accepted yet, so those URIs may not work. The real locations of
documents may vary for backwards compatibility.
Note that this does not mean that users have to learn SGML to submit changes to our documents. We accept all other formats as well. However, they will be translated into SGML by one of the Debian-Doc people.
The other options were: LaTeX, HTML, Texinfo, and several other
minor formats.
The other options were linuxdoc-sgml or DocBook. Linuxdoc is
no longer maintained; DocBook is judged by many to be too big and complex
and difficult to customize.