Six uses of classification in online retrieval systems are envisioned--to improve recall and precision; to conceptualize meaning of vague search terms; to provide structure for browsing; to provide framework for retrieval of nonbibliographic information; to collocate citations; and to achieve compatibility of retrieval languages. Seven sources are…

Describes various ways in which software systems for online catalogs can be designed to enhance subject access. Highlights include what to search (subject headings, titles, notes, authority-file records, classification numbers, and associated text); truncation and stemming; spelling correction; search strategies (headings, keywords, Boolean…

After a brief description of the Micrographic Catalog Retrieval System (MCRS) and its use in card production, searching procedures are outlined along with statistical data. The experience has demonstrated that the use of MCRS can mean a saving of staff time and more rapid retrieval of LC cataloging copy for current books. (6 references) (Author/NH)

Keyword searches in title statement and subject headings retrieved more relevant references than search by LC or Dewey class numbers or by scanning the Dewey class numbers for area codes. An analysis of false drops was made to determine how the search strategy could be improved. (Author/NH)

Reports on study conducted at the James J. Hill Reference Library in St. Paul, Minnesota, which explored the extent to which duplicate records in the OCLC database are affecting usefulness of system. Search keys and 'search enhancements' recently introduced by OCLC are discussed with examples. Thirteen references are cited. (EJS)

Reviews a wide range of retrieval problems that arose with the implementation of an online catalog in an academic library, especially the problem of retrieving uniform titles coded as authors. The need for changes in the underlying format of coding uniform titles as a universal solution is discussed. (Author/CLB)

Four artificial intelligence (AI) concepts that have relevance for information retrieval systems are discussed and applied to area of authority control in automated catalogs--pattern recognition, representation, problem solving, learning. Existing automated authority control systems are analyzed using two other AI concepts, augmentation and…

This overview of the current capabilities of subject access in online public catalogs discusses keyword searching versus subject cataloging, users' views of the online catalog, and user-friendly versus user-hostile systems. Existing online catalogs in public and academic libraries are cited as examples. (EJS)

This paper analyzes proposals for augmenting library bibliographic records for improved subject searching in online catalogs by providing access to parts of books. Arguments for and against adding book content indexing, possible fields for enrichment, and feasibility of 11 alternatives for providing such information are presented. Twenty-two…

A multifaceted card catalog use study was conducted at University of Illinois Music Library to determine hourly rate of use at sound recording and book/music catalogs; time spent at catalogs; who uses catalogs and why; difficulties users encounter; success rate of users' searches; recommendations for designing online catalog. (16 references)…

This description of the functional characteristics of 20 online public catalogs in libraries in the United States notes their origin and scope, search methods, access points, search commands, record displays, user assistance, database and technical characteristics, and costs. Six references and illustrative material are provided. (EJS)

Review of the 1991 literature on subject access in online systems discusses users and subject searching; subject access in online catalogs, including improvement of the database, search processing, the user interface, and user understanding; subject cataloging and indexing; information retrieval; thesaurus and indexing approaches; classification;…

Describes the Dewey Online Retrieval System (DORS), which was developed at the University of California, Los Angeles (UCLA), to experiment with classification-based search strategies in online catalogs. Classification structures in automated information retrieval are discussed; and specifications for a classification retrieval interface are…

This paper describes an experiment in the use of Dewey Decimal Classification in online catalogs to introduce classed approach to subject searching of library collections, enhance subject terminology indexed in online catalog, and provide possibilities for search strategies not possible through alphabetical approach of subject headings and/or…

Describes a study conducted at the University of Illinois to test the effectiveness of subject access in the online bibliographic catalog. Relevance is examined and possible methods of improving subject access are described. Results suggest that significant improvements are not possible within the constraints of existing subject cataloging…