Describes a system developed at the National Aeronautics and Space Administration (NASA) that automatically converts index terms from the Defense Technical Information Center (DTIC) to NASA thesaurus terms. The NASA Lexical Dictionary (NLD) that generates thesaurus terms for indexing is explained, and the development of machine-aided indexing is…

Describes the use of machine aided indexing as part of NASA's information systems. The discussion covers reasons for incorporating machine aided indexing, the lexical dictionary used, subject switching, natural language processing, benefits to the system, and possible future developments. (CLB)

Recent work on the development of Synthesized User Based Terminology Index Languages (SUBTIL), i.e., index and query languages for information systems which employ vocabulary elicited from potential users of the system, is described in this paper. Following a brief review of the literature on thesaurus construction and index languages is a…

Describes online catalog research being conducted in Europe in the areas of interaction and interface design, subject access, functional improvement through the application of information retrieval techniques, and library networks. Three operational online catalogs, not available outside Europe, are discussed. (30 references) (CLB)

Reviews student use of electronic searching tools and the effect of software changes on user satisfaction and success. Discusses the results of two surveys of InfoTrac users before and after software changes at Northern Illinois University, and proposes three strategies systems developers can take to balance the differing needs of sophisticated…

Describes the implementation of a new set of indexes in the NOTIS/LUIS system that provide author, title, and subject access to bibliographic and authority records in the NOTIS/MARC format. The discussion covers index record structure and content, the design philosophy and process, and functions supported by the system. (Author/CLB)

As part of its mission to provide centralized services for the acquisition, storage, retrieval, and dissemination of scientific and technical information (STI) to support Department of Defense (DoD) research, development, and engineering studies programs, the Defense Technical Information Center (DTIC) sponsors the Shared Bibliographic Input…

Presents a classification scheme for generations of online catalogs; discusses current online technologies and identifies deficiencies; and discusses enhancements that will take online catalogs into the next generation. Such enhancements will include increased access to information through user-system dialogue, automatic search aids, subject…