Examines through a series of mathematical models (theorems, descriptions, and examples), properties and operations on inverted files, which are used in an information retrieval system based on thesaurus with weighted descriptors. (CWM)

Some of the literature concerning citation indexing is discussed with emphasis on research projects. (52 references) (Author/NH)

Describes an alternative method for indexing images in an image database. The method consists of manually indexing a selected reference image, and then using retrieval by graphical content to automatically transfer the manually assigned index terms from the reference image to the images to be indexed. (AEF)

The report is concerned with the implementation of an on-line information storage and retrieval system for the Rome Air Development Center. This system is to incorporate techniques of automatic document classification for a large document collection in an interactive environment. Following a review of the system design, the implementation of the…

This review of the Keyword-in-Context (KWIC) indexing considers its inception by Luhn, its original format and purpose, various applications and uses of the basic KWIC concept, its advantages and disadvantages, and evaluations of its effectiveness. (30 references) (Author/NH)

Proper name matching schemes are reviewed and an updated version of these schemes is tested on a suburban telephone book. (Author/AB)

A series of five runs comprised of 20 searches each were carried out in a three-year span of the INSPEC data base. The same queries were processed manually in the corresponding volumes of Science Abstracts, and comparison of the output of each search method exposed reasons for the failures. Emphasis is laid on the fact that a query comprises other…

INTERACTIVE COMPUTER SYSTEMS ESTABLISH A DIALOG BETWEEN THE MAN AND THE MACHINE. BY MEANS OF DISPLAYS, THE USER RECEIVES IMMEDIATE FEEDBACK OF THE RESULT OF HIS ACTIONS, AND HE IS ABLE TO MODIFY HIS DECISIONS IN ORDER TO OBTAIN A SYSTEM RESPONSE THAT IS MOST RELEVANT TO HIS NEEDS. BOLD (BIBLIOGRAPHIC ON-LINE DISPLAY) IS AN EXAMPLE OF A HIGHLY…

ERIC (Educational Resources Information Center) was the first attempt to develop a systematic way of collecting, storing, organizing, disseminating, and analysing information in the field of education. ERIC operates at four levels. At the top is the governmental level office, central ERIC, which supervises the ERIC Processing and Reference…

It is shown that this new automatic indexing technique can be applied with the same effectiveness shown earlier for indexes derived from words in titles or title-like phrases; the basic difference being that linear notation symbols rather than words are used as the indexing units. (17 references) (Author/NH)

An introduction to the classification principles for documents at the Non-Formal Education Information Center is given for the cataloger. The classification scheme, itemized in the first section, consists of 11 main categories such as concepts, training methods, program content, bibliographies, and countries. The next section details…

TRIAL is an information processing system that will perform editing, indexing, and retrieval of textual and certain types of numeric information. The system allows for: (1) the creation and maintenance of a master file, (2) indexing on words designated as 'key' words or, alternatively, on every word in the text, excluding those common terms that…

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)…

Describes database and index design and data collection methods for compilation of the National Tune Index, a comprehensive, multifaceted tool for research in and analysis of eighteenth century American and British secular music, restoration of early American theater works, and identification of specific tune or text fragments. (MBR)