We present a user interface, the OntoRefiner1 system, for helping the user to navigate numerous retrieved documents after a search querying a semantic portal which integrates a ver...
Abstract. We address the problem of answering queries using expressive symmetric inter-schema constraints which allow to establish mappings between several heterogeneous informatio...
Abstract. Caching can highly improve performance of query processing in distributed databases. In this paper we show how this technique can be used in grid architecture where data ...
Piotr Cybula, Hanna Kozankiewicz, Krzysztof Stence...
In this paper, some considerations on extension of the Datalog language are proposed in order to apply this language on a GEFRED fuzzy relational database. For this integration, w...
All the languages for querying semistructured data and the web use as an integral part regular expressions. Based on practical observations, finding the paths that satisfy those r...