Sams Teach Yourself XML in 21 Days, Second Edition is a completely rewritten edition but remains a tutorial-based introduction to XML. The book begins explaining the basics, proceeds into structuring and processing with namespaces, XLink, SAX, DOM, and XSLT, and then to presentation and data exchange with displaying in the browser and transferring data. The author provides an appendix with some of the current "tools of the trade" to bring the reader up to speed on tools available and how to use them.