181 INFORMATION RETRIEVAL SYSTEMS The successful formulation of an information retrieval system (by a librarian ) depends on how closely another person's (user's) document requirements can be simulated. Or how much allowance can be made for the highest number of wants without ending up with a meaningless and undefined system.
-> Heuristic 159;
& Ambiguity 4, 10; Autonomy 56, 58, 60; Context 102, 103; Mapping 226; Practical 272, 273, 275;
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