From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying



Feier, Cristina, Lutz, Carsten and Wolter, Frank
(2018) From Conjunctive Queries to Instance Queries in Ontology-Mediated Querying. In: Twenty-Seventh International Joint Conference on Artificial Intelligence {IJCAI-18}, 2018-7-13 - 2018-7-19.

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Abstract

We consider ontology-mediated queries (OMQs) based on expressive description logics of the ALC family and (unions) of conjunctive queries, studying the rewritability into OMQs based on instance queries (IQs). Our results include exact characterizations of when such a rewriting is possible and tight complexity bounds for deciding rewritability. We also give a tight complexity bound for the related problem of deciding whether a given MMSNP sentence is equivalent to a CSP.

Item Type: Conference or Workshop Item (Unspecified)
Uncontrolled Keywords: cs.AI, cs.AI, cs.DB
Depositing User: Symplectic Admin
Date Deposited: 16 Aug 2018 08:18
Last Modified: 26 Jan 2023 02:36
DOI: 10.24963/ijcai.2018/250
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3024611