Acquiring Ontology Axioms through Mappings to Data Sources

Floriana Di Pinto, Giuseppe De Giacomo, Domenico Lembo, Maurizio Lenzerini and Riccardo Rosati
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Floriana Di Pinto: Microsoft
Giuseppe De Giacomo: DIAG, Sapienza Università di Roma, Via Ariosto, 25, 00185 Roma, Italy
Domenico Lembo: DIAG, Sapienza Università di Roma, Via Ariosto, 25, 00185 Roma, Italy
Maurizio Lenzerini: DIAG, Sapienza Università di Roma, Via Ariosto, 25, 00185 Roma, Italy
Riccardo Rosati: DIAG, Sapienza Università di Roma, Via Ariosto, 25, 00185 Roma, Italy

Future Internet, 2019, vol. 11, issue 12, 1-23

Abstract: Although current languages used in ontology-based data access (OBDA) systems allow for mapping source data to instances of concepts and relations in the ontology, several application domains need more flexible tools for inferring knowledge from data, which are able to dynamically acquire axioms about new concepts and relations directly from the data. In this paper we introduce the notion of mapping-based knowledge base (MKB) to formalize the situation where both the extensional and the intensional level of the ontology are determined by suitable mappings to a set of data sources. This allows for making the intensional level of the ontology as dynamic as the extensional level traditionally is. To do so, we resort to the meta-modeling capabilities of higher-order description logics, in particular the description logic Hi ( DL-Lite R ) , which allows seeing concepts and relations as individuals, and vice versa. The challenge in this setting is to design efficient algorithms for answering queries posed to MKBs. Besides the definition of MKBs, our main contribution is to prove that answering instance queries posed to MKBs expressed in Hi ( DL-Lite R ) can be done efficiently.

Keywords: ontology-based data access; higher-order description logics; DL-Lite; query answering (search for similar items in EconPapers)
JEL-codes: O3 (search for similar items in EconPapers)
Date: 2019
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