Outlines a behavioral approach to information retrieval system design based on the derivation of a behavioral model of the information-seeking patterns of academic social scientists. The extent to which identified information-seeking characteristics are supported by existing systems is considered, and requirements for implementing these features…

Describes PLEXUS, an expert system for information retrieval related to gardening, designed at the University of London for use in public libraries. Focusing on the semantic problems encountered, methods used in artificial intelligence and information science to resolve them are discussed, including classification and facet analysis. (Author/LRW)