XSLT are the "XSL Transformations".

As described in [0]

> XSLT ... is a language for transforming XML documents into other XML documents. ... XSLT is designed for use as part of XSL, which is a stylesheet language for XML.

If you don't know what "XML" is, go ask your favorite search engine.

If you want to know who uses XSLT, go review the existing discussion on the topic. In summary, it's a bunch of people that Google doesn't really care about (and almost certainly far more people than use WebUSB or WebMIDI [1] and the like).

[0] <https://www.w3.org/TR/1999/PR-xslt-19991008>

[1] Yes, really.

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MangoToupe 6 days ago | parent [-]

My question stands. What value does this provide society?

	▲	simoncion 5 days ago \| parent [-]
		If you have specific questions about XSLT or the standard(s) that define it, I'm happy to attempt to answer them.