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 (s-to-o) 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 an s-to-o rewriting of a given data service), and computation (computing an s-to-o rewriting of a data service).
Semantic characterization of data services through ontologies / Cima, Gianluca; Lenzerini, Maurizio; Poggi, Antonella. - In: IJCAI. - ISSN 1045-0823. - (2019), pp. 1647-1653. (Intervento presentato al convegno 28th international joint conference on artificial intelligence tenutosi a Macao; China) [10.24963/ijcai.2019/228].
Semantic characterization of data services through ontologies
Gianluca Cima
;Maurizio Lenzerini
;Antonella Poggi
2019
Abstract
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 (s-to-o) 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 an s-to-o rewriting of a given data service), and computation (computing an s-to-o rewriting of a data service).File | Dimensione | Formato | |
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