At 04:40 AM 10/19/95 CDT, you wrote:
>So far, I've been working with HTML-tags but the main contractor
>has decided on SGML as a standard. Therefore I have a number of
>questions which I hope you can help me answer. Do please e-mail me
>at the address below.
>
>1. What is the main difference between HTML and SGML?
 
There is information about SGML at [1].  [1] is part of the University of
Waterloo's ENL210E[2], a completely on-line Technical Writing course that
was created entirely in SGML, and where all of the assignments are done in
SGML.  Note that precisely speaking HTML documents _are_ SGML documents.
 
>2. Apart from a Mosaic or Netscape browser, what supplementary(?)
>browser is needed to read SGML-marked documents?
 
SGML-marked documents can be read directly by SoftQuad Panorma (which is
distributed by NCSA with Mosaic), or they can be converted into any format
under the sun.  We convert into HTML and Word for Windows format.
 
>3. Can documents marked in HTML be "mixed" with documents in SGML?
>I.e. can I happily continue doing my HTML-stuff while browsing
>around for SGML-knowledge?
 
Yes.  We mix HTML and SGML.
 
>4. Are there any SGML-tutorials available over the net or any
>recommended books?
 
In addition to [1], you might want to drop by [3].
 
>5. Does SGML count as a mark-up language?
 
No.  SGML is the "Standard Generalized Markup Language", but that should be
parsed (Standard (Generalized Markup) Language).  It is not a markup
language itself.  You use it to _create_ markup languages.  HTML is one of
the languages created with SGML.
 
[1]http://watarts.uwaterloo.ca/ENGL/courses/engl210e/210e/module/tech/sgml/
[2]http://arts.uwaterloo.ca/ENGL/courses/engl210e/index.html
[3]http://www.sil.org/sgml/sgml.html