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Burnett, John E.; And Others – Journal of Documentation, 1979
Analyzes a study of the effect of controlled variations in indexing vocabulary size on retrieval performance, using the Cranfield 200 and 1400 test collections. Sets of variable-length character strings were tested, in an application of the Cluster Hypothesis and in a series of linear associative retrieval experiments. (Author/SW)
Descriptors: Automatic Indexing, Evaluation Methods, Indexes, Indexing

Lalmas, Mounia; Ruthven, Ian – Journal of Documentation, 1998
Reports on a theoretical model of structured document indexing and retrieval based on the Dempster-Shafer Theory of Evidence. Highlights include passage retrieval, hypertext, relevance, information needs, implementation of the model, an evaluation scheme designed to test the model's effectiveness, and results of experiments that investigated…
Descriptors: Documentation, Evaluation Methods, Hypermedia, Indexing

Rada, Roy; And Others – Journal of Documentation, 1988
Describes the indexing concept of entry terms, and evaluates existing terms in the Medical Subject Headings by comparing them to the results of an automatic indexer. The results of experimental testing of a strategy for creating entry terms using the algorithms of the automatic indexer are presented. (31 references) (CLB)
Descriptors: Algorithms, Automatic Indexing, Computational Linguistics, Concept Mapping