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Peer reviewedSvenonius, Elaine – Journal of the American Society for Information Science, 1972
The question is asked: Of index terms assigned to documents, which function most effectively in retrieval, the most used or popular terms, or those which are used relatively infrequently? The experiment is a retrieval experiment and uses the Cranfield-Salton data. (14 references) (Author)
Descriptors: Indexing, Information Processing, Relevance (Information Retrieval), Subject Index Terms
Download full textSchipma, Peter B. – 1971
Words and word fragments from the computer-readable data bases "Chemical Abstracts Condensates" and "Biological Abstracts Previews" were analyzed in terms of length, number, and frequency of appearance to determine some parameters upon which inversion of these data bases could be predicated. Types (unique words or fragments)…
Descriptors: Algorithms, Data Analysis, Databases, Indexes
Schuegraf, Ernst J. – 1975
A description of a retrospective document retrieval system is given in which equifrequent fragments are used as language elements for compression coding and retrieval. The critical parameters governing the system are identified, and restrictions imposed by the parameters on the selection of fragments are outlined. Changes necessary in the…
Descriptors: Computational Linguistics, Computer Programs, Computers, Data Processing
