Relaxing and restraining queries for OBDA

Andreşel, Medina, Ibáñez-García, Yazmín, Ortiz, Magdalena and Šimkus, Mantas 2019. Relaxing and restraining queries for OBDA. Presented at: AAAI-2019: 33rd AAAI Conference on Artificial Intelligence, Honololu, HI, USA, 27 January - 1 February 2019. Proceedings of the AAAI Conference on Artificial Intelligence. , vol.33 (1) Palo Alto, California, USA: AAAI, pp. 2654-2661. 10.1609/aaai.v33i01.33012654

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Abstract

We advocate the use of ontologies for relaxing and restraining queries, so that they retrieve either more or less answers, enabling the exploration of a given dataset. We propose a set of rewriting rules to relax and restrain conjunctive queries (CQs) over datasets mediated by an ontology written in a dialect of DL-Lite with complex role inclusions (CRIs). The addition of CRI enables the representation of knowledge about data involving ordered hierarchies of categories, in the style of multi-dimensional data models. Although CRIs in general destroy the first-order rewritability of CQs, we identify settings in which CQs remain rewritable.

Item Type:	Conference or Workshop Item (Paper)
Date Type:	Publication
Status:	Published
Schools:	Computer Science & Informatics
Publisher:	AAAI
ISBN:	9781577358091
Date of First Compliant Deposit:	1 April 2020
Date of Acceptance:	1 November 2018
Last Modified:	27 Jul 2020 11:00
URI:	https://orca.cardiff.ac.uk/id/eprint/130679

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