On 4 October 2010 12:25, Keith J. Schultz <keithjschu...@web.de> wrote: > > TeX was developed as a subset of SGML or if you wish clone, variant, > etc. >
This is completely wrong, and anachronistic. SGML was born long after TeX and LaTeX. It is true that LaTeX's syntax owes a debt to Scribe (as Lamport says somewhere), and that Scribe, Waterloo Script and similar systems were early forerunners of the concept of structure/content distinction that was later also taken up by SGML. But in any case, none of this applies to Knuth's plain TeX, which was developed independently as a software project to typeset his own books. Dominik
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