Shows how deductive data management techniques can be applied to the utilization of data value classifications in information retrieval. A representation of classifications which supports transitive computation is defined, and an operation-oriented deductive query language tailored for classification-based deductive information retrieval in fact…

Important characteristics of lexical databases and their applications in information retrieval and natural language processing are explained. An ongoing project using various machine-readable sources to build a lexical database is described, and detailed designs of individual entries with examples are included. (Contains 66 references.) (EAM)

The Excerpta Medica on-line test data base of 181,653 records was found to be supplementary to MEDLINE and TOXLINE but especially responsive to searches on drug products. (Author)

The micrographics terms used by the National Reprographic Centre for documentation (NRCd) to index material which appears in the Reprographics Quarterly and other NCRd information system components are compiled in this thesaurus. The terms are not defined, except to note the meanings of some terms in the context of the NRCd system. Directions for…

This brief review of the Educational Resources Information Center (ERIC) system is intended to make users more aware of (1) the system as a whole, (2) the process of indexing educational literature for the database, and (3) the role of the Thesaurus of ERIC Descriptors in the overall information dissemination process. An overview of the ERIC…

Describes the utility and applications of information retrieval thesauri and the development of the thesaurus for the DISCLOSURE data base. (PF)

Explores the potential for a fully developed energy vocabulary conversion guide. Reports on the analysis and integration of 11 existing vocabularies. (Author/PF)

A new method for concentrating keywords of a thesaurus, based on a mathematical study of the distribution of characters in a defined natural language. (Author/KP)

Discusses three approaches to thesaurus and indexing/retrieval language maintenance for combined databases: reindexing, merging, and initial standardization. Two thesauri for a combined database are evaluated in terms of their compatibility, and indexing practices are compared. Tables and figures help illustrate aspects of the comparison. (SW)

Describes MARS (Museum Archive Retrieval System), a research tool which enables organizations to exchange digital images and documents by means of a common thesaurus structure, and merge the descriptive data and metadata of their collections. Highlights include theoretical basis; searching the MARS database; and examples in European museums.…

Image processing technology allows libraries to include photographs, paintings, monograph title pages, and maps in their databases. This article examines problems of and solutions to image indexing and retrieval, focusing on thesaurus-based indexing systems, visual thesauri and related hybrid systems, picture description languages, and image…

Provides an overview of recent developments relating to the application of thesauri in information organization and retrieval on the World Wide Web. Discusses recent thesaurus projects; types of thesauri on the Web; thesauri integrated within databases and information retrieval systems; multiple thesaurus systems; standards for electronic…

In order to permit systematic searching of multiple data bases to satisfy requests in interdisciplinary areas, a mapping of a portion of "Medical Subject Headings" to three other controlled vocabularies has been constructed. (Author)

Emphasizes class maintenance of National Library of Medicine's bibliographic retrieval file in which maintenance actions (replacement, deletion, addition) reflect yearly changes in Medical Subject Headings (MeSH). File maintenance of other authoritative information attached to headings, class maintenance failures, checking class maintenance,…