Abstract
This chapter gives an overview of the Semantic Web which aims to enable automatic retrieval, extraction and integration of information on the World Wide Web (WWW). Event though the current Web has become a big success, it lacks a proper support to Web users when it comes to finding, extracting and combining information. The main obstacle is that, at present, the meaning of Web content is not machine-accessible. The Semantic Web extends the current Web providing machine processable semantics to Web resources. This chapter is built around the Semantic Web layered architecture introduced by its inventor, Tim Berners-Lee. Each layer and language of the Semantic Web is described in terms of its major concepts and core aspects. As part of the lower layers of the Web architecture, the chapter introduces Unicode: the Uniform Resource Identifier (URI), the Extensible Markup Language (XML), the Document Type Definition (DTD), and the XML Schema. The chapter then discusses languages that are built on top of the syntactic layers introduced previously, namely the Resource Description Framework (RDF), RDF Schema (RDFS), SPARQL, the Web Ontology Language (OWL), its new version OWL2, and the Rule Interchange Format (RIF). The chapter then briefly reports on the other layers of the Semantic Web architecture and discusses the latest development of the Web and Semantic Web, know as Linked Open Data.
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Fensel, D., Facca, F.M., Simperl, E., Toma, I. (2011). Semantic Web. In: Semantic Web Services. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-19193-0_6
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