B. , F. Llll, C. Bbbbb, and S. , Pushing the EL envelope further, CEUR Workshop Proceedings, CEUR-WS.org, 2008.

B. , J. F. Llll-`-llll-`, M. Mmmmmmm, M. L. Sss, and E. , On Rules with Existential Variables: Walking the Decidability Line, Artiicial Intelligence, vol.175, pp.9-10, 2011.

B. , M. Bbbbbbb, P. Mmmmmmm, M. Ttttt, S. Uuuuuuu et al., Ontologymediated query answering for key-value stores, International Joint Conference on Artiicial Intelligence, 2017.

B. , E. Ccc, D. Cccccc, B. Rrrr, M. Xxx et al., Obda beyond relational dbs: A study for mongodb, pp.8-27, 1926.

C. , A. Gg, G. Pppppp, and A. , Towards more expressive ontology languages: e query answering problem, Artiicial Intelligence, vol.193, pp.87-128, 2012.

C. , D. Ggg, G. D. Lllll, D. Lllllllll, M. Rrrr et al., Tractable Reasoning and EEcient ery Answering in Description Logics: e DL-Lite Family, J. Autom. Reasoning, vol.39, issue.3, pp.385-429, 2007.

M. , M. Rrrrrrr, M. Uuuuuuu, and F. , Ontology-mediated queries for NOSQL databases, Proceedings of the irtieth AAAI Conference on Artiicial Intelligence, 2016.

P. , A. Lllll, D. Ccc, D. Dd-ggg, G. Lllllllll et al., Linking data to ontologies, J. Data Semantics, vol.10, pp.133-173, 2008.

S. , A. , W. , F. Kkkkkkk, M. Ccccc et al., Xmark: A benchmark for xml data management, Proceedings of the 28th international conference on Very Large Data Bases VLDB Endowment, pp.974-985, 2002.