In this paper, we present the virtual knowledge graph (VKG) paradigm for data integration
and access, also known in the literature as Ontology-based Data Access. Instead of …

Description logics (DLs) have a long tradition in computer science and knowledge
representation, being designed so that domain knowledge can be described and so that …

We present the framework of ontology-based data access, a semantic paradigm for
providing a convenient and user-friendly access to data repositories, which has been …

Abstract Information systems have to deal with an increasing amount of data that is
heterogeneous, unstructured, or incomplete. In order to align and complete data, systems …

We propose a new family of description logics (DLs), called DL-Lite, specifically tailored to
capture basic ontology languages, while keeping low complexity of reasoning. Reasoning …

Many organizations nowadays face the problem of accessing existing data sources by
means of flexible mechanisms that are both powerful and efficient. Ontologies are widely …

The Definitive Volume on Cutting-Edge Exploratory Analysis of Massive Spatial and
Spatiotemporal DatabasesSince the publication of the first edition of Geographic Data …

The recently introduced series of description logics under the common monikerDL-Lite'has
attracted attention of the description logic and semantic web communities due to the low …

Data integration is a pervasive challenge faced in applications that need to query across
multiple autonomous and heterogeneous data sources. Data integration is crucial in large …

In this paper we present MASTRO, a Java tool for ontology-based data access (OBDA)
developed at Sapienza Università di Roma and at the Free University of Bozen-Bolzano …