Tutorials
Ontologies, Query
An ontology is an explicit specification of a conceptualization of a certain domain of interest. Ontological query answering amounts to returning the answers to a query, that are logically entailed by the union of a data set (a set of membership assertions) and an ontology, where the latter is a set of logical assertions. Ontological query answering has applications, for instance, in the Semantic Web and in semantic data integration. In this tutorial we give an overview of the most important ontology formalisms for the Semantic Web, and we illustrate the most relevant query answering techniques, with particular emphasis on their efficiency.
Andrea Calì, Andreas Pieris