Abstract
The ability of machines to deal more effectively with «meaning» may permit significant developments. The statistically based matching of keyword combinations and text fragments often governed by limited Boolean relations hardly reflects the rich semantics of query and source. However, more sophisticated knowledge representation formalisms developed within cognitive and AI research into knowledge-based systems expose to machine manipulation much more of the content of relatively deeper levels of human communication: Europe is well represented in the quests for both theoretical and empirical advances in knowledge-based information retrieval
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