Extensible Style Language (XSL)
Proposed by Microsoft & Co
Specifies how XML is to be presentedMaps XML files to HTML files
Mapping specification written in XML itself (!)
Rule-based mappingsExample: Map <title>s occurring in <div1>s to <H2>
Future browsers will have XSL support built-inXML + XSL + HTML4 = Industrial strength publication
Plugin for XSL available since January 1998 (MXSL)