Ontology-based data access (OBDA) is receiving great attention as a new paradigm for
managing information systems through semantic technologies. According to this paradigm, a …

In this paper we present Mastro, a Java tool for ontologybased data access (OBDA)
developed at Sapienza Universita di Roma. Mastro manages OBDA systems in which the …

Ontology-based data access (OBDA) aims at enriching query answering by taking general
background knowledge into account when evaluating queries. This background knowledge …

In this paper we present an in progress prototype for the graphical visualization and
management of mappings for Ontology-based data access (OBDA). The tool supports the …

Abstract Reasoning with complex ontologies can be a resource-intensive task, which can be
an obstacle, eg, for real-time applications. Hence, weakening the constraints of soundness …

Abstract Information explosion leads to continuous growth of data distributed over different
data sources. However, the increasing number of data sources increases the risk of …

In the last years ontologies have been applied increasingly as a conceptual view facilitating
the federation of numerous data sources using different access methods and data schemes …

The main purpose of an" Ontology-based Information System"(OIS) is to provide an explicit
description of the domain of interest, called ontology, and let all the functions of the system …

The ability to perform reasoning on inconsistent data is a central problem both for AI and
database research. One approach to deal with this situation is consistent query answering …

Due to the continuously growing amount of data the federation of different and distributed
data sources gained increasing attention. In order to tackle the challenge of federating …