{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T18:15:03Z","timestamp":1771697703935,"version":"3.50.1"},"reference-count":22,"publisher":"Association for Computing Machinery (ACM)","issue":"12","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Proc. VLDB Endow."],"published-print":{"date-parts":[[2020,8]]},"abstract":"<jats:p>\n            We consider the problem of integrating heterogeneous data (relational, JSON, key-values, graphs etc.) and querying it efficiently. Traditional data integration systems fall into two classes:\n            <jats:italic toggle=\"yes\">data warehousing<\/jats:italic>\n            , where all data source content is materialized in a single repository, and\n            <jats:italic toggle=\"yes\">mediation<\/jats:italic>\n            , where data remains in their original stores and all data can be queried through a\n            <jats:italic toggle=\"yes\">mediator.<\/jats:italic>\n          <\/jats:p>\n          <jats:p>We propose to demonstrate Obi-Wan, a novel mediator following the Ontology-Based Data access (OBDA) paradigm. Obi-Wan integrates data sources of many data models under an interface based on RDF graphs and ontologies (classes, properties, and relations between them). The novelty of Obi-Wan is to combine maximum integration power (GLAV mappings, see below) with the highest query answering power supported by an RDF mediator: RDF queries not only over the data but also over the integration ontologies. This makes it more flexible and powerful than comparable systems.<\/jats:p>","DOI":"10.14778\/3415478.3415512","type":"journal-article","created":{"date-parts":[[2020,9,14]],"date-time":"2020-09-14T18:46:35Z","timestamp":1600109195000},"page":"2933-2936","source":"Crossref","is-referenced-by-count":20,"title":["Obi-Wan"],"prefix":"10.14778","volume":"13","author":[{"given":"Maxime","family":"Buron","sequence":"first","affiliation":[{"name":"Inria and Institut Polytechnique de Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fran\u00e7ois","family":"Goasdou\u00e9","sequence":"additional","affiliation":[{"name":"Univ. Rennes, CNRS, IRISA, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ioana","family":"Manolescu","sequence":"additional","affiliation":[{"name":"Inria and Institut Polytechnique de Paris, France"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Marie-Laure","family":"Mugnier","sequence":"additional","affiliation":[{"name":"Univ. Montpellier, LIRMM, Inria, France"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"320","published-online":{"date-parts":[[2020,8]]},"reference":[{"key":"e_1_2_1_1_1","volume-title":"IJCAI","author":"Abdallah N.","year":"2009","unstructured":"N. Abdallah, F. Goasdou\u00e9, and M. Rousset. DL-LITER in the light of propositional logic for decentralized data management. 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