XSLT documents a core technology for processing XML. Originally created for page layout, XSLT (Extensible Stylesheet Transformations) is now much more: a general-purpose translation tool, a system for reorganizing document content, and a way to generate multiple results - such as HTML, WAP, and SVG - from the same content. "XSLT" covers XSLT and XPath, a critical companion standard, and addresses topics ranging from basic transformations to complex sorting and linking. It explores extension functions on a variety of different XSLT processors and shows ways to combine multiple documents using XSLT. Code examples add a real-world dimension to each technique. Useful as XSLT is, its peculiar characteristics make it difficult to get started in, and the ability to use advanced techniques depends on a clear and exact understanding of how XSLT templates work and interact. For instance, the understanding of "variables" in XSLT is deeply different from the understanding of "variables" in procedural languages. The author explains XSLT by building from the basics to its more complex and powerful possibilities.