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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, ...
OBDA with the Ontop Framework

Calvanese D; Cogrel B; Guzel Kalayci E; Komla Ebri S; Kontchakov R; Lanti D; Rezk M; Rodriguez-Muro M; Xiao G (Curran, 2015)
Ontology-based data access (OBDA) has become a popular paradigm for accessing data stored in legacy sources using Semantic Web technologies. In the OBDA setting, users access the data through a conceptual layer, which ...