Discusses restrictions regarding use of bibliographic data bases, cites their rationale in terms of cooperation in input creation, economics and administrative control, and notes their effect on use. (Author/CWM)

Discussion of user problems with navigating large spaces in virtual information environments focuses on a top-down application of semantic knowledge by the user from experiences within the sociocognitive context of information production and consumption. Considers individual differences in studies of interaction; spatial and semantic cues; and…