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A Librarian's Guide to Graphs, Data and the Semantic Web by James Powell

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5

Ontologies

The graph segments that make up triples in the Semantic Web have another dimension of connections that link subjects, predicates, and some object values to structured vocabularies called ontologies. This is how the RDF graph model encourages the use of shared terminology for instance data. Ontologies describe the kinds of things that exist in a particular knowledge domain and their relationships to one another. These are called classes. RDF nodes are then identified as being of a particular class that is defined within a given ontology. In addition, the edges in triples are given the same treatment. They are defined in ontologies as properties. This chapter discusses the process of modeling and representing ontologies. It introduces ...

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