Figure: The Semantic Web Layer Cake (Berners-Lee, 2000).
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The Semantic Web is an extension of the current web.
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It aims to give information a well-defined meaning, thereby
creating a pathway for machine-to-machine communication and
automated serives based on descriptions of semantics.
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XML files and web resources capture objects and classes.
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RDF describes relationships between objects and classes.
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Ontologies provide a formal conceptualization (semantic representation)
of a particular domain shared by a group of people.
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Ontology-based applications will be built on top
of the Semantic Web infrastructure (i.e., XML, RDF and ontologies)
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