ata are provided as such, without any warranty of consistency from the provider, and the retrievers have to make it consistent before introducing it into their own databases. Other frameworks are also different in this respect: neither the knowledge sharing (when the opportunity to modify the shared knowledge is considered) nor the software agents provide any warranty about the consistency of the knowledge they provide.
H. Quang. 17. GI-Workshop über Grundlagen von Datenbanken (17th GI-Workshop on the Foundations of Databases), Wörlitz, 17. - 20. Mai 2005, page 78-82. Institute of Computer Science, Martin-Luther-University Halle-Wittenberg, (May 2005)