A new method of indexing functional groups in organic compounds is described, utilizing the Cahn-Ingold-Prelog sequence rule. Functional carbon atoms are first classified by functionality, a measure of the oxidation state, then ordered by means of a modified sequence rule. Substructure searching and other applications are discussed. (30…

The technique for machine-aided indexing developed at the Defense Documentation Center (DDC) is illustrated on a randomly chosen abstract. Additional text is provided in coded form so that the reader can more fully explore this technique. (2 references) (Author)

This is the continuation of the guide to the organization of small technical libraries. (The first part appeared in the September-October Bulletin and is LI 502 590.) This part deals with general processing, the application of mechanized and other non-traditional processes, information work, the future, and includes the bibliography. (93…

The use of a structured system of storing information, particularly relational indexing, can lead to situations in which items would not be retrieved due to technicalities of the system. To overcome such problems a study was made of condensations with the aim of providing a series of rules to apply. (4 references) (Author/SJ)

A system of automatic indexing based on Baye's theorem is described briefly. (18 references) (Author)

The author describes a method of automatic indexing using the assignment of priority to verbs which may also be viewed as a simulation of how a person classifies documents. (15 references) (Author/SJ)

Because of an absence of theory, rules and conventions for thesaurus construction and maintenance, an investigation of how thesauri are actually updated was conducted. Two concepts crucial to any theoretical foundation of thesauri and two techniques for systematic updating of a thesaurus are presented for consideration. (46 references) (Author/KE)

There are six major studies of the effect of indexing depth on retrieval performance. They differ in purpose, methodology, measures, indexing language, field of study, and data base--nevertheless, all have found depth of indexing to have the same effect upon information retrieval. (13 references) (Author/NH)

The operational retrospective retrieval service offered by BIOSIS exploits a file created essentially without vocabulary control. A pragmatic program of file building criteria has been persued which has provided improved retrieval and an annual summary of the vocabulary of the literature. (11 references) (Author/KE)

A report on the Ames SDI-KWOK Index (Selective Dissemination of Information--Key Word Out of Context), a computerized information system designed to notify each user of documents of interest, with the help of the descriptors he provides on his user profile. (LS)

Provision of abstracts-in-source for all articles in library and information science journals is proposed. Standards for the bibliographical format of abstracts should be compiled by the American National Standards Institute. Keywords for indexing-in-source of abstracts should be taken from a thesaurus of library and information science to be…

In the field of United States history, the influence of abstracting and indexing services upon the use of serial literature, because of the highly inadequate retrospective and util recently, current access they afford to it, can only be regarded as a negative use. (Author)

The application of concepts for viewing events or relationships in other languages may lead to new and better systems for classing and retrieving data in the English language. (AB)

Proposes a method for alleviating entry and filing problems arising from the practice of using initialisms that abbreviate full periodical titles, and, on the basis of a survey of periodical publishers, recommends using consistent entry under full form. (Author/FM)