XML (eXtensible Markup Language) is able to interact seamlessly across the Web, regardless of operating systems, languages, or other traditional impediments to the flow of information across networks. Virtually every computer-industry professional, from Web-page designer to interface guru to alpha geek, needs to be able to use XML. This training-class-in-a-book pedagogy provides presentations that can only be written by experienced trainers, with tips, discussions, numerous hands-on exercises, and full end-of-chapter labs to assess learning progress.