Now showing items 1-4 of 4

    • Ontology Based Data Access in Statoil 

      Kharlamov E; Hovland D; Skjæveland MG; Bilidas D; Jiménez-Ruiz E; Xiao G; Soylu A; Lanti D; Rezk M; Zheleznyakov D; Giese M; Lie H; Ioannidis Y; Kotidis Y; Koubarakis M; Waaler A (2017)
      Ontology Based Data Access (OBDA) is a prominent approach to query databases which uses an ontology to expose data in a conceptually clear manner by abstracting away from the technical schema-level details of the underlying ...
    • Ontology-based data integration in EPNet: Production and distribution of food during the Roman Empire 

      Calvanese D; Liuzzo P; Mosca A; Remesal J; Rezk M; Rull G (2016)
      Semantic technologies are rapidly changing the historical research. Over the last decades, an immense amount of new quantifiable data have been accumulated, and made available in interchangeable formats, in social sciences ...
    • Ontop: Answering SPARQL queries over relational databases 

      Calvanese D; Cogrel B; Komla-Ebri S; Kontchakov R; Lanti D; Rezk M; Rodriguez-Muro M; Xiao G (2017)
      We present Ontop, an open-source Ontology-Based Data Access (OBDA) system that allows for querying relational data sources through a conceptual representation of the domain of interest, provided in terms of an ontology, ...
    • Optique: Zooming in on Big Data 

      Giese M; Soylu A; Vega-Gorgojo G; Waaler A; Haase P; Jiménez-Ruiz E; Lanti D; Rezk M; Xiao G; Özçep Ö; Rosati R (2015)
      Optique overcomes problems in current ontology-based data access systems pertaining to installation overhead, usability, scalability, and scope by integrating a user-oriented query interface, semi-automated managing methods, ...