See Also
This document is deliberately not an exhaustive discussion of SGML,
the DTDs listed, and the FreeBSD Documentation Project. For more
information about these, you are encouraged to see the following web
sites.
The FreeBSD Documentation Project
The FreeBSD
Documentation Project web pages
The FreeBSD Handbook
SGML
The SGML/XML web
page, a comprehensive SGML resource
Gentle introduction to SGML
HTML
The World Wide Web
organisation
The HTML 4.0
specification
DocBook
The Davenport
Group, maintainers of the DocBook DTD
The Linux Documentation Project
The Linux Documentation
Project web pages