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
- Knows that Web Ontology Language (OWL) is available in multiple "flavors" that are variously optimized for expressivity, performant reasoning, or for applications involving databases or business rules
- Programatically infers triples using custom functions or methods.
- Understands the concept of Federated Searches.
- Uses common entailment regimes and understands their uses.