XSLT For Dummies by Richard Wagner [Repost]

Restructuring information in an XML document so that it works in other formats used to be a time-consuming ordeal involving lots of blood, sweat, and tears. Now XSLT (Extensible Stylesheet Language Transformations) makes the process nearly instantaneous. Just provide an example of the kind of information you’d like to see, and XSLT does the rest.