Since it seems a lot of people have trouble with SGML, since there is <irony> very few documentation</irony> about a language which is supposed to ease the job of documenting, since FAQ are... frequent on this topic, I just wrote the Debian SGML/XML HOWTO.
The emphasis is on practical information: how to type and how to process SGML files. It is Debian-specific and intended that way: for any other Unix, I would have to double its size, just for compilation and installation instructions. http://www.debian.org/~bortz/SGML-HOWTO/ You are welcome to send patches, speling fixes, request for improvments or additions.
