DocBook is a very nice SGML DTD. It is similar to the LinuxDOC DTD, 
(both have QWERTZ as heritage), but is much better designed. Both FreeBSD
and the Linux Documentation Project are converting to DocBook. 
 
   :!mcr!:            |  Network and security consulting/contract programming
   Michael Richardson |         Firewalls, TCP/IP and Unix administration
 Personal: http://www.sandelman.ottawa.on.ca/People/Michael_Richardson/Bio.html
 Corporate: http://www.sandelman.ottawa.on.ca/SSW/
	ON HUMILITY: To err is human, to moo bovine.