no code implementations • 22 Jul 2022 • Piero Bonatti, Gianluca Cima, Domenico Lembo, Lorenzo Marconi, Riccardo Rosati, Luigi Sauro, Domenico Fabio Savo
Controlled Query Evaluation (CQE) has been recently studied in the context of Semantic Web ontologies.
no code implementations • 24 Apr 2020 • Gianluca Cima, Domenico Lembo, Riccardo Rosati, Domenico Fabio Savo
Finally, we identify a semantically well-founded notion of approximated query answering for CQE, and prove that, for DL-Lite$_{\mathcal{R}}$ ontologies, this form of CQE is tractable with respect to data complexity and is first-order rewritable, i. e., it is always reducible to the evaluation of a first-order query over the data instance.
no code implementations • 26 Nov 2015 • Elena Botoeva, Diego Calvanese, Valerio Santarelli, Domenico Fabio Savo, Alessandro Solimando, Guohui Xiao
Ontology-based data access (OBDA) is a novel paradigm facilitating access to relational data, realized by linking data sources to an ontology by means of declarative mappings.