Several biological databases exist which use different formats for storing data. Further, each database has its own schema and a query interface. There exist no standard conversio...
An inverse of a schema mapping M is intended to "undo" what M does, thus providing a way to perform "reverse" data exchange. In recent years, three different f...
Ronald Fagin, Phokion G. Kolaitis, Lucian Popa, Wa...
Abstract. The Web has been rapidly “deepened” with the prevalence of databases online. On this “deep Web,” numerous sources are structured, providing schema-rich data– Th...
In this paper we propose algorithms for combining and ranking answers from distributed heterogeneous data sources in the context of a multi-ontology Question Answering task. Our pr...
The large amount of information that is spread over the Internet is an important resource for all people but also introduces some issues that must be faced. The dynamism and the un...
Sonia Bergamaschi, Giacomo Cabri, Francesco Guerra...