The Mastro Protégé Plug-In for OBDA.

Ontology-based data access (OBDA) is a recent approach for accessing data where an ontology is connected to autonomous, and generally pre-existing, data repositories through mappings, so as to provide a high-level, conceptual view over such data. Mastro is a Java tool for OBDA developed at Sapienza University of Rome and at the startup OBDA Systems, which is able to manage an OBDA specification where the ontology is specified in DL-Lite. In this work, we present the Mastro plug-in for the popular ontology editor Protege. By means of this plug-in, the users can specify and manage full OBDA specifications and execute SPARQL queries posed over the ontology level to access data stored in the underlying data sources.