The perfect resource for beginning XML programmers, this guidebook clearly shows you what XML is, how to use it, and what technologies surround it. The authors build on the strengths of previous editions while covering the latest changes in the XML landscape such as XQuery, RSS and Atom, and Ajax. The most recent specifications are presented along with best practices to follow when developing XML solutions. The fourth edition will help you quickly progress from XML basics to more advanced programming techniques. You’ll delve into the state of the art for XML and databases, discover how to query XML information, retrieve.