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<p>Ontology  Based  Data  Access  (OBDA)  is  a  prominentapproach to  query databases  which uses  an ontology to  expose  datain a conceptually clear manner by abstracting away from the technicalschema-level details of the underlying data. The ontology is ‘connected’to the data via mappings that allow to automatically translate queriesposed over the ontology into data-level queries that can be executed by theunderlying database management system. Despite a lot of attention fromthe research community, there are still few instances of real world indus-trial use of OBDA systems. In this work we present data access challengesin the data-intensive petroleum company Statoil and our experience inaddressing these challenges with OBDA technology. In particular, we havedeveloped a deployment module to create ontologies and mappings fromrelational databases in a semi-automatic fashion, and a query process-ing module to perform and optimise the process of translating ontologi-cal queries into data queries and their execution. Our modules have beensuccessfully deployed and evaluated for an OBDA solution in Statoil.</p

Ontology Based Access to Exploration Data at Statoil