OntoMongo- Ontology-Based Data Access for NoSQL

Ontology-based data access (OBDA) has gained attention in recent years for providing access to large volumes of data by using ontologies as a conceptual layer and exploring their ability to describe domains and deal with data incompleteness. This is done through mappings that connect the data in the database to the vocabulary of the ontology. The first OBDA studies were about data stored in relational databases. Recent studies have begun to extend the use of OBDA to NoSQL databases. In this paper, we present a novel approach for OBDA with document-oriented NoSQL databases. Differently from related works, our approach uses an access interface with an intermediate conceptual layer that is extensible and flexible, capable of providing access to different types of database management systems. To validate the approach, we have implemented a prototype for MongoDB, using a real-world application domain as a case study.