Semantic Annotation and Retrieval: Web of Data

Abstract

The World Wide Web has radically altered the way knowledge is shared by lowering the barrier to publishing and accessing documents. Recent initiatives have extended the principles and architecture of the Web to sharing and accessing data, resulting in an interconnected, global data space -- the Web of Data. This chapter reviews the historical and scientific context to the emergence of this Web of Data, before detailing the technologies and principles on which it is based. Applications that have been developed and deployed on the Web of Data are reviewed, as are key resources in the field. The chapter concludes with a discussion of current research challenges in areas such as user interfaces, data fusion, link maintenance, trust, and privacy.