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Tsarkov, D. and Horrocks, I. (2004) Efficient Reasoning with Range and Domain Constraints. Proceedings of the 2004 Description Logic Workshop (DL 2004), 104, 41-50.

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• TITLE: Converting Instance Checking to Subsumption: A Rethink for Object Queries over Practical Ontologies

  AUTHORS: Jia Xu, Patrick Shironoshita, Ubbo Visser, Nigel John, Mansur Kabuka

  KEYWORDS: Description Logic, Ontology, Object Query, SHI, Most Specific Concept

  JOURNAL NAME: International Journal of Intelligence Science, Vol.5 No.1, January 6, 2015

  ABSTRACT: Efficiently querying Description Logic (DL) ontologies is becoming a vital task in various data-intensive DL applications. Considered as a basic service for answering object queries over DL ontologies, instance checking can be realized by using the most specific concept (MSC) method, which converts instance checking into subsumption problems. This method, however, loses its simplicity and efficiency when applied to large and complex ontologies, as it tends to generate very large MSCs that could lead to intractable reasoning. In this paper, we propose a revision to this MSC method for DL SHI , allowing it to generate much simpler and smaller concepts that are specific enough to answer a given query. With independence between computed MSCs, scalability for query answering can also be achieved by distributing and parallelizing the computations. An empirical evaluation shows the efficacy of our revised MSC method and the significant efficiency achieved when using it for answering object queries.