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Subject:Re: What is SGML? From:Jim Gardner <jag -at- RAHUL -dot- NET> Date:Sun, 10 Aug 1997 11:33:47 -0700
SGML is the parent of HTML, which is a Document Type Definition (DTD)
of its parent. There're many many texts on the Web about SGML and HTML,
so I won't go into the details. Try searching Yahoo! or elsewhere for both
The emergence of dynamic HTML (DHTML) and XML languages in 1997 make
this an easier disctinction to understand.
At 02:36 PM 8/8/97 +0100, Geoff Lane wrote:
>On 8 August 1997, Carlolyn Haley (<dcma -at- MAIL1 -dot- NAI -dot- NET>) wrote:
>> I learned yesterday that the book typesetting I was doing on an ArborText
>> was in fact SGML, a great thing to have on my resume. Would someone
>> tell me what SGML is and how it differs from typestting and relates to
>I'm no expert but, hopefully, someone more knowledgeable than I will
>correct any errors:
>(S)tructured (G)eneralized (M)arkup (L)anguage:
>In SGML, you mark up a document by tagging it to denote the document's
>structure. The tags appear very similar to HTML tags; they are delimited
>by angle-brackets, e.g. <P>. It's not surprising that SGML tags appear
>similar to HTML; HTML is an SGML application.
>All SGML applications use Document Type Definitions (DTD's) to define
>valid document structure. Each industry has its own favourites, e.g.
>DocBook, and various ISO DTD's. These definitions are separate files which
>the SGML software applies to each document in the document class. BTW,
>HTML uses DTD's but they are embedded within the browser.
>Note that DTD's only define valid structure; they contain no typographical,
>or other, formatting information. You specify a document format using
>Document Style and Semantics Specification Language (DSSSL), or other
>formatting specification. This way you can format a document specifically
>for the purpose to hand, e.g. you'd use different DSSSL specifications for
>printed copy and on-line documentation.
>I, for one, would like to know a lot more about the subject. Not only is
>it good for your CV, it appears to be an extremely powerful route to
>platform and software independence.
>(geoff -at- gjctech -dot- force9 -dot- net)
>Languages with GOTO's are Wirth-less !
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