XSLT is short for XML Stylesheet Transformations, and it's a language for converting XML documents into other formats--usually another XML dialect, but it can output plain text as well. The popular use of XSLT is to convert XML into HTML, and it's valuable because you've got complete control over how that HTML looks, making it possible to build an XSLT "template" that will spit out web pages matching your site's look and feel. (more...)