Accents in SGML

We're translating the PG docs to Portuguese and we're trying to find out
the proper way to get accent characters in the SGML sources.

I've found different approaches by looking around. Some say to just
include the characters in the sources. Are there shortcuts like HTML's
"á"?

Thanks,

-Roberto

--
+----| http://fslc.usu.edu/ USU Free Software & GNU/Linux Club |------+
  Roberto Mello - Computer Science, USU - http://www.brasileiro.net/
       http://www.sdl.usu.edu/ - Space Dynamics Lab, Developer
Do HD's sneeze when they catch a virus?