MurrayS
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(May 23, 2009 - 5:59 PM)
I think the progression of tags such as HTML and XML started with TeX, created by Donald Knuth. Leslie Lamore built on TeX, with macros that made TeX easier to use, and that was called LaTeX. This is where my memory gets fuzzy but I believe SGML was based on either TeX or LaTeX, someone more knowledgeable than I can probably remember. Then HTML was based on SGML and from HTML became XML.
Both TeX and LaTeX had files, secondary to the main document, that contained macros, footnotes, etc. This was back in the the mid- to late 80's.
Again, this may be incorrect as that was 20 years ago but that is what I can remember.
Regards,
Murray