Query and Predicate Emptiness in Ontology-Based Data Access

Baader, Franz, Bienvenu, Meghyn, Lutz, Carsten and Wolter, Frank
(2016) Query and Predicate Emptiness in Ontology-Based Data Access. JOURNAL OF ARTIFICIAL INTELLIGENCE RESEARCH, 56. pp. 1-59.

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<jats:p>In ontology-based data access (OBDA), database querying is enriched with an ontology that provides domain knowledge and additional vocabulary for query formulation. We identify query emptiness and predicate emptiness as two central reasoning services in this context. Query emptiness asks whether a given query has an empty answer over all databases formulated in a given vocabulary. Predicate emptiness is defined analogously, but quantifies universally over all queries that contain a given predicate. In this paper, we determine the computational complexity of query emptiness and predicate emptiness in the EL, DL-Lite, and ALC-families of description logics, investigate the connection to ontology modules, and perform a practical case study to evaluate the new reasoning services.</jats:p>

Item Type: Article
Depositing User: Symplectic Admin
Date Deposited: 07 Jul 2016 10:25
Last Modified: 19 Jan 2023 07:34
DOI: 10.1613/jair.4866
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3002145