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  • 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, ...