By
Alessio Fiorentino, Marco Manna, and Jessica Zangari
University of Calabria, Rende, Italy
ABSTRACT
Ontology-mediated query answering (OMQA) is an emerging paradigm at
the basis of many semantic-centric applications. In this setting, a conjunctive query has to be evaluated against a knowledge base consisting of an extensional database paired with an ontology, which provides a semantic conceptual view of the data. Among the formalisms that are capable to express such a conceptual layer, the Web Ontology Language OWL is certainly the most popular one.