XHTML
Acronym: Extensible Hypertext Markup Language. Reformulation of HTML as an XML application.
XML
Acronym: eXtensible Markup Language. XML is the World Wide Web Consortium’s (W3C) recommended standard for creating formats and sharing data on the Web.
XSL
Acronym: eXtensible Stylesheet Language. A set of recommendations for defining XML document transformation and presentation.
