Extensible Stylesheet Language. A standard that lets you do the following:

• Specify an addressing mechanism, so that you can identify the parts of an XML document that a transformation applies to (XPath).
• Specify tag conversions, so that you can convert XML data into different formats (XSLT).
• Specify display characteristics, such page sizes, margins, and font heights and widths, as well as the flow objects on each page. Information fills in one area of a page and then automatically flows to the next object when that area fills up. That allows you to wrap text around pictures, for example, or to continue a newsletter article on a different page (XSL-FO).