lnforination Retrieval From the Management Point of View
نویسنده
چکیده
Several conclusions may now be drawn by management, based on results derived from several "laboratory" experiments in information retrieval. A major finding is that a controlled indexing language (controlled by an authority list of headings) will not provide more effective retrieval than will the uncontrolled type. Automatic indexing, using semantic and syntactic devices, does not improve upon the performance of a manual system. Increasing the number of subject entries per document (with or without computer) will increase the number of retrievals relevant to a question, but will at the same time disproportionately increase the number of nonrelevant references.
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