Ontology-based data access - Beyond relational sources

@article{Botoeva2019OntologybasedDA,
  title={Ontology-based data access - Beyond relational sources},
  author={Elena Botoeva and Diego Calvanese and Benjamin Cogrel and Julien Corman and Guohui Xiao},
  journal={Intelligenza Artificiale},
  year={2019},
  volume={13},
  pages={21-36}
}
The database (DB) landscape has been significantly diversified during the last decade, resulting in the emergence of a variety of non-relational (also called NoSQL) DBs, e.g., XML and JSON-document DBs, key-value stores, and graph DBs. To enable access to such data, we generalize the well-known ontology-based data access (OBDA) framework so as to allow for querying arbitrary data sources using SPARQL. We propose an architecture for a generalized OBDA system implementing the virtual approach… 
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