The Extensible Markup Language is changing the way that information is being stored and exchanged. It is also changing the very way that we think about data. XML Unleashed allows you to unlock this new power and get you well on your way towards developing XML applications and systems that enable your most important business processes, or your simplest visions for data representation and exchange. Written for those already familiar with many of the concepts of XML, but still not sure how to make best use of the technologies, this book helps you become a more advanced user of XML. This book covers all the necessary topics from the basics of Document Type Definitions (DTDs) to the more advanced topics in XML database integration and the semantic web. This book is designed to be the only XML book that the reader will ever need on their shelf. XML is a standard and has become the common thread facilitating very different computer applications communicate by categorizing and tagging the data, reading, interpreting, sorting and linking the results. Within this book you will find coverage of important existing and emerging XML Standards as well as many varied and popular implementations of XML in this 21st century. We include WSDL, UDDI, SVG, ebXML Microsoft's .NET, which is the world's largest XML implementation to date and the Semantic Web which is just now being articulated.