Ontology-based Data Access: The Interplay of SPARQL and Entailment Regimes

Ontology-based Data Access

Ontology-based data access (OBDA) is a data integration framework where data is accessed using queries on the ontology layer, and in turn, a set of mappings guide the data access on the underlying relational layer.

This process is usually done via query rewriting wrt. ontology and query unfolding wrt. mappings respectively. In this way, the data need not to be re-materialized in a triple store, but rather—in an orthogonal way—data is exposed as a view via the defined ontology concepts and properties.

Nevertheless, in the context of ontology-based data management, i.e., updates in OBDA are challenging as the problem of view update is inherently not solved in the field of database theory.

We discuss the problem and possible solutions in various settings, as well as the relation to triple stores. In the end, we show two components of PoolParty Semantic Suite, namely GraphSearch and GraphEditor as candidates for ontology-based data management.