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The focus of this paper is information brokers within Information Discovery (ID). We describe Cumulative Duality matrices, an instrument to deal with design criteria for such information brokers. ID is the synthesis of Information Retrieval and Information Filtering, where information brokers act as middle-agents. There are numerous design criteria for information brokers. Since these stem from ID,...
Abstract. In this article, a formalisation of index expressions is presented. Index expressions are more expressive than keywords while maintaining a comprehensible complexity. Index expressions are well-known in Information Retrieval (IR), where they are used for characterising document contents, formulation of user interests, and matching mechanisms. In addition, index expressions have found both...
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