SGML

About

An SGML System Conforming to International Standard ISO 8879 -- Standard Generalized Markup Language.

http://www.jclark.com/sp/

Home page.

http://www.jclark.com/sp/howtoget.htm

How to get SP.

http://www.whoishostingthis.com/resources/sgml/

Comprehensive list of links to SGML resources.

PSGML mode for Emacs

http://www.emacswiki.org/emacs/PsgmlMode

Emacs wiki.

http://www.snee.com/bob/sgmlfree/emcspsgm.html

PSGML Tricks.

http://psgml.sourceforge.net/

Project page.

https://sourceforge.net/projects/psgml/

Project page.