Database Technologies for Semantic Web

This document discusses several database technologies for the semantic web including triplestores, Sesame, SeSQL, Virtuoso, Jena, R2RQ, and large triplestores. Triplestores store RDF data as subject-predicate-object triples and support adding, removing, and querying triples. Sesame is an open-source framework for querying, inferencing and analyzing RDF data that can use several database backends. SeSQL is Sesame's RDF query language. Virtuoso is an object-relational SQL database with a built-in web server that supports SPARQL. Jena is an RDF API from HP Labs for reading, writing and querying RDF with OWL support