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We study the exchange of information in collective information systems mediated by information agents, focusing specifically on the problem of semantic interoperability. We advocate the use of mechanisms inspired from natural language, that enable each agent to develop a repertoire of grounded categories and labels for these categories and negotiate their use with other agents. The communication system...
We propose an approach that unifies browsing by tags and visual features for intuitive exploration of image databases. In contrast to traditional image retrieval approaches, we utilise tags provided by users on collaborative tagging sites, complemented by simple image analysis and classification. This allows us to find new relations between data elements. We introduce the concept of a navigation map,...