🚀 go-pugleaf

This newsgroup hashed over the SGML issue almost one year ago.
The upshot, as I remember, was that people whose livelihoods
depended on SGML thought it was great, while those who didn't
thought it was nearly useless.  The important thing to remember
is, SGML isn't.

SGML != standard generalized markup language

It isn't standard, as there are several tag sets, such as APA
and CALS.  CALS is even a superset of SGML.

It isn't generalized, because it doesn't handle graphics, tables,
or equations.  CALS does, which is why it's a superset of SGML.

It isn't for page markup, but rather, for describing documents
hierarchically.  Kinda like TeX or troff macros!

It isn't a language, but a syntax for describing a language,
like Backus-Naur Form.

The Holy Grail that everybody's looking for is the ability to
readily interchange documents.  So far SGML doesn't help much
in that regard, because common document formatting systems--
TeX, troff, Frame, Interleaf, MSword, WordPerfect, etc.-- don't
read or write SGML.  And that's the bottom line.