Contributions to Proceedings:
G. Gottlob, A. Pieris:
"Beyond SPARQL under OWL 2 QL Entailment Regime: Rules to the Rescue";
in: "roceedings of the Twenty-Fourth International Joint Conference on Artificial Intelligence, IJCAI 2015",
We consider the scenario of ontology-based query answering. It is generally accepted that true scalability in this setting can only be achieved via query rewriting, which in turn allows for the exploitation of standard RDBMSs. In this work, we close two open fundamental questions related to query rewriting. We establish that linear existential rules are polynomially combined rewritable, while full linear rules are polynomially (purely) rewritable; in both cases, the target query language consists of first-order or non-recursive Datalog queries. An immediate consequence of our results is that DLR-Lite_R, the extension of DL-Lite_R with n-ary roles, is polynomially combined rewritable.
Electronic version of the publication:
Project Head Stefan Woltran:
Created from the Publication Database of the Vienna University of Technology.