What does XML stand for?

eXtensible Markup Language: some more precision, in reverse order:


XML is a language to define other languages: it is in fact a meta-language.


This informs us that the structuring elements of that language will be tags, like used in HTML: a tag name enclosed in brackets: <ATag>.


XML is not a language (which is by definition fixed) but a meta-language. XML is a set of rules, that a language must respect in order to be XML conformant. Therefore you can define your own mark-up language, and make it to evolve at your envy.

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