I've been using the sgmltools under NetBSD for time time. 
  They are nice, but they sure are complicated.

   :!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
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	ON HUMILITY: To err is human, to moo bovine.