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Dettaglio pubblicazione

2019, CEUR workshop proceedings, Pages 33-35 (volume: 2495)

Exploiting ontologies for explaining data sources semantics (04d Abstract in atti di convegno)

Cima G., Lenzerini M., Poggi A.

We study the problem of associating formal semantic descriptions to data services. We base our proposal on the Ontology-Based Data Access paradigm, where a domain ontology is used to provide a semantic layer mapped to the data sources of an organization. The basic idea is to explain the semantics of a data service in terms of a query over the ontology. We illustrate a formal framework for this problem, based on the notion of source-to-ontology rewriting, which comes in three variants, called sound, complete and perfect, respectively. We present a thorough complexity analysis of two computational problems, namely verification (checking whether a query is a rewriting of a given data service), and computation (computing a rewriting of a data service).
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