Abstract
Conjunctive query answering is becoming a very important task on the Semantic Web as the adoption of SPARQL query language increases. There is considerable work done in the area of optimizing conjunctive query answering for RDF and OWL2-DL ontologies, in the latter case namely for queries without undistinguished variables. However, there has not been much emphasis on how to handle queries with both distinguished and undistinguished variables efficiently. In this paper, we present a novel algorithm for answering conjunctive queries over OWL2-DL ontologies with undistinguished variables efficiently. These optimizations are implemented in the Pellet query engine and our experimental evaluation shows that the new optimization improves the query performance significantly.
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References
OWL 2 Web Ontology Language Document Overview (2009), http://www.w3.org/TR/2009/PR-owl2-overview-20090922/
Baader, F., Calvanese, D., McGuinness, D., Nardi, D., Peter, P.-S.: The Description Logic Handbook, Theory, Implementation and Applications, Cambridge (2003)
Calvanese, D., De Giacomo, G., Lenzerini, M.: On the Decidability of Query Containment under Constraints. In: Proceedings of Principles on Database Systems 1998, pp. 149–158 (1998)
Dolby, J., Fokoue, A., Kalyanpur, A., Ma, L., Schonberg, E., Srinivas, K., Sun, X.: Scalable Grounded Conjunctive Query Evaluation over Large and Expressive Knowledge Bases. In: Sheth, A.P., Staab, S., Dean, M., Paolucci, M., Maynard, D., Finin, T., Thirunarayan, K. (eds.) ISWC 2008. LNCS, vol. 5318, pp. 403–418. Springer, Heidelberg (2008)
Glimm, B., Horrocks, I., Lutz, C., Sattler, U.: Conjunctive Query Answering in the Description Logic \(\mathcal{SHIQ}\). In: Proceedings of the 20th International Joint Conference on Artificial Intelligence, IJCAI 2007 (2007)
Glimm, B., Horrocks, I., Sattler Conjunctive, U.: Query entailment for \(\mathcal{SHOQ}\). In: Proc. of the 2007 Description Logic Workshop (DL 2007). CEUR Electronic Workshop Proceedings, vol. 250, pp. 65–75 (2007), http://ceur-ws.org/Vol-250
Guo, Y., Pan, Z., Heflin, J.: LUBM: A benchmark for OWL knowledge base systems. Journal of Web Semantics 3(2-3), 158–182 (2005)
Haarslev, V., Möller, R.: On the scalability of description logic instance retrieval. J. Autom. Reason. 41(2), 99–142 (2008)
Horrocks, I., Kutz, O., Sattler, U.: The even more irresistible sroiq. In: Doherty, P., Mylopoulos, J., Welty, C.A. (eds.) KR, pp. 57–67. AAAI Press, Menlo Park (2006)
Horrocks, I., Patel-Schneider, P.F.: Reducing OWL entailment to description logic satisfiability. J. Web Sem. 1(4), 345–357 (2004)
Horrocks, I., Sattler, U.: A tableaux decision procedure for \(\mathcal{SHOIQ}\). In: Proc. of the 19th Int. Joint Conf. on Artificial Intelligence (IJCAI), pp. 448–453. Morgan, San Francisco (2005)
Horrocks, I., Sattler, U., Tobies, S.: Reasoning with individuals for the description logic \(\mathcal{SHIQ}\). In: McAllester, D. (ed.) CADE 2000. LNCS, vol. 1831, Springer, Heidelberg (2000)
Horrocks, I., Tessaris, S.: A conjunctive query language for description logic aboxes. In: AAAI/IAAI, pp. 399–404 (2000)
Ma, L., Yang, Y., Qiu, Z., Xie, G.T., Pan, Y., Liu, S.: Towards a complete OWL ontology benchmark. In: Sure, Y., Domingue, J. (eds.) ESWC 2006. LNCS, vol. 4011, pp. 125–139. Springer, Heidelberg (2006)
Ortiz, M., Calvanese, D., Eiter, T.: Data complexity of query answering in expressive description logics via tableaux. J. Autom. Reason. 41(1), 61–98 (2008)
Patel-Schneider, P.F., Hayes, P., Horrocks, I.: Owl web ontology language semantics and abstract syntax section 5. rdf-compatible model-theoretic semantics. Technical report, W3C ( December 2004)
Sirin, E., Parsia, B.: Optimizations for answering conjunctive ABox queries. Description Logics (2006)
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Křemen, P., Kouba, Z. (2011). Conjunctive Query Optimization in OWL2-DL. In: Hameurlain, A., Liddle, S.W., Schewe, KD., Zhou, X. (eds) Database and Expert Systems Applications. DEXA 2011. Lecture Notes in Computer Science, vol 6861. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-23091-2_18
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DOI: https://doi.org/10.1007/978-3-642-23091-2_18
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