In recent years, the core of the Semantic Web has evolved to a conceptual layer built by a set of ontologies mapped onto data distributed in numerous data sources which are interlinked, interpreted and processed in terms of semantics. In this context federated querying of Linked Data becomes a central issue. This paper presents the federated query engine ELITE, which facilitates a complete and transparent integration and querying of distributed autonomous data sources.

Keywords: Description Logics, Query rewriting, Web Ontology Language (OWL), Entailment Regimes, Ontology-based Data Access (OBDA)
Author: Nolle, Andreas
Time required: P45M
Educational use: professionalDevelopment
Educational audience: professional

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