Describes a method of selecting index terms directly from a word frequency list, an idea originally suggested by Goffman. Results of the analysis of word frequencies of two articles seem to indicate that the automated selection of index terms from a frequency list holds some promise for automatic indexing. (Author/MBR)

Describes a study that examined back of book indexes produced by 37 authors and 27 nonauthors to see whether differences between the 2 groups of indexers could be discerned by counting the occurrence of 3 characteristics in their indexes: number of index pages, modified headings, and cross-reference use. (27 references) (LRW)

Compares two information retrieval systems, CLARIT and TOPIC, in terms of assigned versus derived and precoordinate versus postcoordinate indexing. Models of information retrieval systems are discussed, and a test of the systems using a demonstration database of full-text articles from the "Wall Street Journal" is described. (Contains 21…

Compares the user features of an in-house online search system based on automatic indexing with those of commercial search services, considering specific user types, file structure and applications, and the basic operating system environment. (FM)

The issue of free-text versus controlled vocabulary is examined. The history of the issue, which is seen as beginning with the debate over title term indexing in the nineteenth century, is reviewed and questions not satisfactorily addressed by previous research are raised. (Author/EM)

Applies a recently suggested method for the automatic indexing of full text to extracts from the Brown Corpus and finds that scientific and technical extracts give rise to a larger number of index terms than social science and humanities extracts. Four tables and an 8-item reference list accompany the text. (Author/JL)

This test of the Strategy of Unlimited Aliasing, an indexing method that places terms from several indexers for the same information object in one index, utilized bibliographic records from the ERIC, LISA (Library and Information Science Abstracts), and ISA (Information Science Abstracts) databases. The test did not support the indexing method.…

Discusses the cost of constructing a hypertext database and suggests cost forecasting approaches that can be used to determine whether organizations can internally fund a hypertext database, or whether producers can afford to market hypertext databases. Production costs in differing hypertext strategies are also compared. (27 references) (LRW)

Proposes an automated document classification system based on the Gray code, information-theoretic considerations, and requirements of classification systems including objectivity, inclusion, linearity, and increasing distance-dissimilarity. A measure to evaluate system performance is developed, and the proposed system is compared with the Library…

Reports on a comparative study of the postcoordinate retrieval effectiveness of Library of Congress Subject Headings and the Preserved Context Indexing System (PRECIS). Data are presented in six tables and one figure, and a reference list is included. (Author/JL)

A series of experiments determined whether thesauri enhance the retrieval of Chinese documents and automatic indexing can compete with manual indexing in a Chinese information retrieval system (CIRS). Statistical analysis of recall and precision measures suggest that relational thesauri do improve retrieval and that automatic indexing is…

Discusses the results of a survey of 255 librarians and college professors that was conducted to determine their preferences regarding three back-of-the-book index features: word-by-word versus letter-by-letter alphabetizing; line-by-line versus run-on subheading arrangement; and see references versus duplicate entries. (Contains 25 references.)…

Describes and discusses the findings of an experiment that tested the precision of full-text retrieval enhanced by 29 document term weighting algorithms at the lowest, middle, and highest levels of recall, and compared with the precision of full-text retrieval without algorithms and with paragraph retrieval. (29 references) (Author/CLB)

Describes the possible improvements in the quality of automatic indexing systems gained by using complex descriptors, and reports on the effectiveness of a simple nonsyntactic phrase indexing procedure. The discussion covers shortcomings of this approach, possible methods for improvement, and areas needing further research. (43 references) (CLB)

Provides background of automatic indexing and overview of Fully Automatic Syntactically based Indexing of Text (FASIT), a system based on idea that content-bearing words belong to certain syntactic categories. Results of comparison of FASIT with thesaurus and stem-based indexing systems on database of 250 documents and 22 queries are summarized.…