A comprehensive and timely look at the hottest Web development technologies. Focusing on large, Web-based applications, this book demonstrates how XML and RDF can help programmers simplify and streamline browsers and networked information. It covers all of the basics of these technologies, discusses how IT staff can get the most out of them, demonstrates how to create XML documents and document type definitions (DTDs), and provides numerous code examples. Companion Web site includes the source code and DTDs discussed in the book, as well as a Java-based XML parser and viewer. With XML (eXtensible Markup Language) and RDF (Resource Description Format), large-scale Web developers at last have the open standard tools capable of keeping up with the Web's high-speed advances. Metadata is data about data-it describes how, when, and by whom data was collected and formatted.