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Nelson, Michael J.; Tague, Jean M. – Journal of the American Society for Information Science, 1985
Proposes split model for index term distribution in document set that uses rank function for high frequency terms and size function for low frequency terms; the point of transition is determined either empirically or by rule. Distributions to describe index term exhaustivity and term co-occurrence are considered briefly. (36 references) (EJS)
Descriptors: Databases, Indexing, Information Retrieval, Models