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Data Grids allow for seeing heterogeneous, distributed, and dynamic informational resources as if they were a uniform, stable, secure, and reliable database. According to this view, current proposals for data integration on Grids are based on the notion of global schema built over a collection of autonomous information sources. On the other hand, in dynamic(More)
In this paper we study a DL rich enough to express UML class diagrams including ISA and disjointness between classes (but not covering constraints), typing of associations, and participation and functional cardinality constraints. For such a DL, which we call DL-Lite, we propose novel reasoning techniques for a variety of tasks, notably including query(More)
— In this paper, we present a recently funded Euro-pean research project, namely WORKPAD, that aims at designing and developing an innovative software infrastructure (software, models, services, etc.) for supporting collaborative work of human operators in emergency/disaster scenarios. In such scenarios, different teams, belonging to different(More)
Although service-oriented architectures go a long way toward providing interoper-ability in distributed, heterogeneous environments, managing semantic differences in such environments remains a challenge. We give an overview of the issue of semantic interoperability (integration), provide a semantic characterization of services, and discuss the role of(More)
Accessing distributed and heterogeneous data sources through domain-oriented conceptual models (ontologies) facilitates the development of smarter information systems, as per the Semantic Web vision. To apply this vision to industrial grade applications, concept-based query answering must be efficient and scalable. This paper describes <i>ONDA</i>, a(More)
This paper introduces the general features of Senso Comune, an open knowledge base for the Italian language, focusing on the interplay of lexical and ontological knowledge, and outlining our approach to conceptual knowledge elicitation. Senso Comune consists of a machine-readable lexicon constrained by an ontological infrastructure. The idea at the basis of(More)
In this paper, we describe the architecture and collaborative approach adopted for the development of Senso Comune (SC), an open knowledge base for the Italian language that combines lexicographic, linguistic, ontological and textual data in a web-based collaborative platform. Senso Comune aims at integrating lexicographic data from users and legacy(More)
In Natural Language Processing, more complex business use cases and shorter delivery times drive a growing need of smoother, more flexible and faster implementations. This trend also requires integrating and orchestrating different functionalities delivered by services belonging to different technological platforms. All these needs imply raising the level(More)