{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,29]],"date-time":"2026-09-29T11:47:42Z","timestamp":1790682462539,"version":"4.1.0"},"publisher-location":"California","reference-count":0,"publisher":"International Joint Conferences on Artificial Intelligence Organization","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,8]]},"abstract":"<jats:p>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).<\/jats:p>","DOI":"10.24963\/ijcai.2019\/228","type":"proceedings-article","created":{"date-parts":[[2019,7,28]],"date-time":"2019-07-28T03:46:05Z","timestamp":1564285565000},"page":"1647-1653","source":"Crossref","is-referenced-by-count":7,"title":["Semantic Characterization of Data Services through Ontologies"],"prefix":"10.24963","author":[{"given":"Gianluca","family":"Cima","sequence":"first","affiliation":[{"name":"Dipartimento di Ingegneria Informatica, Automatica e Gestionale, Sapienza Universit\u00e0 di Roma"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maurizio","family":"Lenzerini","sequence":"additional","affiliation":[{"name":"Dipartimento di Ingegneria Informatica, Automatica e Gestionale, Sapienza Universit\u00e0 di Roma"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Antonella","family":"Poggi","sequence":"additional","affiliation":[{"name":"Dipartimento di Lettere e Culture Moderne, Sapienza Universit\u00e0 di Roma"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"10584","event":{"name":"Twenty-Eighth International Joint Conference on Artificial Intelligence {IJCAI-19}","theme":"Artificial Intelligence","location":"Macao, China","acronym":"IJCAI-2019","number":"28","sponsor":["International Joint Conferences on Artificial Intelligence Organization (IJCAI)"],"start":{"date-parts":[[2019,8,10]]},"end":{"date-parts":[[2019,8,16]]}},"container-title":["Proceedings of the Twenty-Eighth International Joint Conference on Artificial Intelligence"],"original-title":[],"deposited":{"date-parts":[[2019,7,28]],"date-time":"2019-07-28T03:47:42Z","timestamp":1564285662000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.ijcai.org\/proceedings\/2019\/228"}},"subtitle":[],"proceedings-subject":"Artificial Intelligence Research Articles","short-title":[],"issued":{"date-parts":[[2019,8]]},"references-count":0,"URL":"https:\/\/doi.org\/10.24963\/ijcai.2019\/228","relation":{},"subject":[],"published":{"date-parts":[[2019,8]]}}}