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…

Description of classification schemes for fiction book retrieval covers traditional methods, universal systems, special systems, genre systems, and development of the AMP-classification system based on multidimensional analysis of users' requests (subject matter, setting, author's intention, accessibility). Trial applications and retrieval tests,…

Discusses methods of browsing in online public access catalogs (OPACs) and describes one method that uses information pertaining to the physical description of books from MARC records to simulate images of books on a library shelf. Electronic browsing through MARC is discussed, and methods of enhancing OPACs are reviewed. (51 references) (LRW)

Discusses problems with subject searches in online library catalogs and examines theoretical principles for the design of effective information retrieval systems. Probabilistic ranking methods are discussed, and an experimental online catalog called CHESHIRE is described. It is noted that CHESHIRE uses classification clustering, provides natural…

This review of research on subject searching in library catalogs includes a summary of research findings, reasons for search failures, free text versus controlled vocabulary searching, and studies of users' needs. Suggestions for future action to improve subject access in the online catalog are noted. A 52-item bibliography is included. (EJS)

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)

Focusing on cataloging operations contingent upon public catalog usage, this article identifies necessary components of a collection access policy, discusses representative samples of policies that can be adapted to individual library practices, and provides guidelines for the development and implementation of a statement useful for planning…

Discusses library use studies that examined library catalog search failures and demonstrates types of online catalog access that can reduce the failures caused by card catalog flaws or by user search errors by half. The use of single keyword, implied Boolean, or derived truncated key retrieval is suggested. (14 references) (LRW)

Reviews literature about cataloging large microform sets. Subjects include: determination of location by remote users of online catalogs, guidelines for prioritizing cataloging of unanalyzed and underused microform collections, catalog versus finding aid, and catalog credibility. (JKP)

Describes research using students at the University of Illinois at Urbana-Champaign that investigated the ways in which different levels of knowledge about a topic can affect search strategies in an online public access catalog. Previous research is reviewed, and implications for information intermediaries and designers of information retrieval…

Presents a cognitive model that provides a user-centered perspective of the information retrieval process and confirms the problematic nature of online library catalogs for children. Related research is reviewed, and it is concluded that developing children's thinking skills will help them search for information. (71 references) (Author/LRW)

Discusses key issues to be addressed in planning for introduction of online public access catalog in academic research library environment. Purpose of catalog, reasons to adopt catalog, user behavior, use of catalog records, authority control, shared or unique systems, and impact on staff are highlighted. Seventy-three sources are cited. (EJS)

This review of the transition from library card catalogs to online public access catalogs (OPAC) (1981-1982) discusses methods employed by online catalog use studies (self-administered questionnaires, OPAC transaction logs, focused-group interviews, feature analysis, online search and retrieval experiments) and new directions for OPAC research…

Discusses subject searching problems in online library catalogs; explains advanced information retrieval (IR) techniques; and describes experiments conducted on a test collection database, CHESHIRE (California Hybrid Extended SMART for Hypertext and Information Retrieval Experimentation), which was created to evaluate IR techniques in online…

This composite report provides summaries of presentations by 10 experts at the 23rd Annual Clinic on Library Applications of Data Processing in April 1986 at the University of Illinois at Urbana-Champaign. All were concerned with the design of online systems to make them easier for library patrons to use. (Author/CDD)