e'''X'''tensible '''S'''tylesheet '''L'''anguage.

A possible alternate spelling would be "[XML] Stylesheet Language".


See http://www.w3.org/TR/xsl/
----
The original intended use was that you would use XSL by using [XSLT] to convert your XML document into [XSL-FO] which would then be renderable into printed form by a suitable application.  But [XSLT] has turned out to be a lot more general than that.
----
[Category Acronym]