The blue social bookmark and publication sharing system.
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What is DBin? The Semantic Web? Machine-processable metadata? Brainlets? A precooked query? An RDF triple? Aren't centralized P2P systems uncool?
BibSonomy is offered by the KDE group of the University of Kassel, the DMIR group of the University of Würzburg, and the L3S Research Center, Germany.