The Semantic Web is an evolving development of the World Wide Web in which the meaning or semantics of information and services on the web is defined, making it possible for the web to "understand" and satisfy the requests of people and machines to use the web content. At its core, the semantic web comprises a set of design principles, collaborative working groups, and a variety of enabling technologies. The semantic web is a vision of information that is understandable by computers, so that they can perform more of the tedious work involved in finding, sharing, and combining information on the web. This book presents and discusses topical information on the Semantic Web.