Abstract
Ontology-based data access is an approach to organizing access to a database augmented with a logical theory. In this approach query answering proceeds through a reformulation of a given query into a new one which can be answered without any use of theory. Thus the problem reduces to the standard database setting.
However, the size of the query may increase substantially during the reformulation. In this survey we review a recently developed framework on proving lower and upper bounds on the size of this reformulation by employing methods and results from Boolean circuit complexity.
V.V. Podolskii—This work is supported by the Russian Science Foundation under grant 14-50-00005 and performed in Steklov Mathematical Institute of Russian Academy of Sciences.
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Notes
- 1.
We use the word “database” in a wide informal sense, that is a database is an organized collection of data.
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Acknowledgments
The author is grateful to Michael Zakharyaschev, Mikhail Vyalyi, Evgeny Zolin and Stanislav Kikot for helpful comments on the preliminary version of this survey.
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Podolskii, V.V. (2015). Circuit Complexity Meets Ontology-Based Data Access. In: Beklemishev, L., Musatov, D. (eds) Computer Science -- Theory and Applications. CSR 2015. Lecture Notes in Computer Science(), vol 9139. Springer, Cham. https://doi.org/10.1007/978-3-319-20297-6_2
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