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by chrismorgan 1339 days ago
> when HTML is understood to be an SGML vocabulary and SGML has all these things and more

HTML hasn’t been SGML for a long time, and it’s never going to go back. Understanding it to be an SGML vocabulary would be a serious error. In the context of HTML, what SGML supports is even more irrelevant than it was twenty years ago (and it was pretty thoroughly irrelevant even then).