Ontology Based Data Access in Statoil

Ontology Based Data Access (OBDA) is a prominent approach to query databases which uses an ontology to expose data in a conceptually clear manner by abstracting away from the technical schema-level details of the underlying data. The ontology is ‘connected’ to the data via mappings that allow to aut...

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Published in:	Web semantics Vol. 44; pp. 3 - 36
Main Authors:	Kharlamov, Evgeny, Hovland, Dag, Skjæveland, Martin G., Bilidas, Dimitris, Jiménez-Ruiz, Ernesto, Xiao, Guohui, Soylu, Ahmet, Lanti, Davide, Rezk, Martin, Zheleznyakov, Dmitriy, Giese, Martin, Lie, Hallstein, Ioannidis, Yannis, Kotidis, Yannis, Koubarakis, Manolis, Waaler, Arild
Format:	Journal Article
Language:	English
Published:	Elsevier B.V 01-05-2017
Subjects:	Bootstrapping Evaluation Ontology Based Data Access Optimisations Optique platform Statoil System deployment Bootstrapping Evaluation Optimisations Statoil Ontology Based Data Access Optique platform System deployment
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Abstract	Ontology Based Data Access (OBDA) is a prominent approach to query databases which uses an ontology to expose data in a conceptually clear manner by abstracting away from the technical schema-level details of the underlying data. The ontology is ‘connected’ to the data via mappings that allow to automatically translate queries posed over the ontology into data-level queries that can be executed by the underlying database management system. Despite a lot of attention from the research community, there are still few instances of real world industrial use of OBDA systems. In this work we present data access challenges in the data-intensive petroleum company Statoil and our experience in addressing these challenges with OBDA technology. In particular, we have developed a deployment module to create ontologies and mappings from relational databases in a semi-automatic fashion; a query processing module to perform and optimise the process of translating ontological queries into data queries and their execution over either a single DB of federated DBs; and a query formulation module to support query construction for engineers with a limited IT background. Our modules have been integrated in one OBDA system, deployed at Statoil, integrated with Statoil’s infrastructure, and evaluated with Statoil’s engineers and data.
AbstractList	Ontology Based Data Access (OBDA) is a prominent approach to query databases which uses an ontology to expose data in a conceptually clear manner by abstracting away from the technical schema-level details of the underlying data. The ontology is ‘connected’ to the data via mappings that allow to automatically translate queries posed over the ontology into data-level queries that can be executed by the underlying database management system. Despite a lot of attention from the research community, there are still few instances of real world industrial use of OBDA systems. In this work we present data access challenges in the data-intensive petroleum company Statoil and our experience in addressing these challenges with OBDA technology. In particular, we have developed a deployment module to create ontologies and mappings from relational databases in a semi-automatic fashion; a query processing module to perform and optimise the process of translating ontological queries into data queries and their execution over either a single DB of federated DBs; and a query formulation module to support query construction for engineers with a limited IT background. Our modules have been integrated in one OBDA system, deployed at Statoil, integrated with Statoil’s infrastructure, and evaluated with Statoil’s engineers and data.
Author	Bilidas, Dimitris Hovland, Dag Lie, Hallstein Ioannidis, Yannis Xiao, Guohui Soylu, Ahmet Jiménez-Ruiz, Ernesto Waaler, Arild Kharlamov, Evgeny Zheleznyakov, Dmitriy Lanti, Davide Koubarakis, Manolis Rezk, Martin Giese, Martin Kotidis, Yannis Skjæveland, Martin G.
Author_xml	– sequence: 1 givenname: Evgeny surname: Kharlamov fullname: Kharlamov, Evgeny email: evgeny.kharlamov@cs.ox.ac.uk organization: University of Oxford, Department of Computer Science, Wolfson Building, Parks Road, OX1 3QD, Oxford, UK – sequence: 2 givenname: Dag surname: Hovland fullname: Hovland, Dag email: hovland@ifi.uio.no organization: Department of Informatics, University of Oslo, Blindern, 0316, Oslo, Norway – sequence: 3 givenname: Martin G. surname: Skjæveland fullname: Skjæveland, Martin G. email: martige@ifi.uio.no organization: Department of Informatics, University of Oslo, Blindern, 0316, Oslo, Norway – sequence: 4 givenname: Dimitris surname: Bilidas fullname: Bilidas, Dimitris email: d.bilidas@di.uoa.gr organization: National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784, Athens, Greece – sequence: 5 givenname: Ernesto surname: Jiménez-Ruiz fullname: Jiménez-Ruiz, Ernesto email: ernestoj@ifi.uio.no organization: Department of Informatics, University of Oslo, Blindern, 0316, Oslo, Norway – sequence: 6 givenname: Guohui surname: Xiao fullname: Xiao, Guohui email: xiao@inf.unibz.it organization: KRDB Center, Free-University of Bozen-Bolzano, P.zza Domenicani 3, 39100, Bolzano, Italy – sequence: 7 givenname: Ahmet surname: Soylu fullname: Soylu, Ahmet email: ahmet.soylu@ntnu.no organization: NTNU – Norwegian University of Science and Technology, Teknologiveien 22, 2815, Gjøvik, Norway – sequence: 8 givenname: Davide surname: Lanti fullname: Lanti, Davide email: dlanti@inf.unibz.it organization: KRDB Center, Free-University of Bozen-Bolzano, P.zza Domenicani 3, 39100, Bolzano, Italy – sequence: 9 givenname: Martin surname: Rezk fullname: Rezk, Martin email: mrezk@inf.unibz.it organization: KRDB Center, Free-University of Bozen-Bolzano, P.zza Domenicani 3, 39100, Bolzano, Italy – sequence: 10 givenname: Dmitriy surname: Zheleznyakov fullname: Zheleznyakov, Dmitriy email: dmitriy.zheleznyakov@cs.ox.ac.uk organization: University of Oxford, Department of Computer Science, Wolfson Building, Parks Road, OX1 3QD, Oxford, UK – sequence: 11 givenname: Martin surname: Giese fullname: Giese, Martin email: martingi@ifi.uio.no organization: Department of Informatics, University of Oslo, Blindern, 0316, Oslo, Norway – sequence: 12 givenname: Hallstein surname: Lie fullname: Lie, Hallstein email: hali@statoil.com organization: Statoil ASA, Stavanger, Norway – sequence: 13 givenname: Yannis surname: Ioannidis fullname: Ioannidis, Yannis email: yannis@di.uoa.gr organization: National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784, Athens, Greece – sequence: 14 givenname: Yannis surname: Kotidis fullname: Kotidis, Yannis email: kotidis@aueb.gr organization: Athens University of Economics and Business, 76 Patission Street, 10434, Athens, Greece – sequence: 15 givenname: Manolis surname: Koubarakis fullname: Koubarakis, Manolis email: koubarak@di.uoa.gr organization: National and Kapodistrian University of Athens, Panepistimiopolis, Ilissia, 15784, Athens, Greece – sequence: 16 givenname: Arild surname: Waaler fullname: Waaler, Arild email: arild@ifi.uio.no organization: Department of Informatics, University of Oslo, Blindern, 0316, Oslo, Norway
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