-
Cochrane, P.A.: Improving LCSH for use in online catalogs : exercises for self-help with a selection of background readings (1986)
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- LCSH
- Subject headings, Library of Congress / Problems, exercises, etc
Subject cataloging / Problems, exercises, etc
Online library catalogs / Subject access / Problems, exercises, etc
Online bibliographic searching / Problems, exercises, etc
- RSWK
- Washington «DC» / Library of Congress / Online-Literaturrecherche / Schlagwortkatalog (BVB)
- Subject
- Washington «DC» / Library of Congress / Online-Literaturrecherche / Schlagwortkatalog (BVB)
Subject headings, Library of Congress / Problems, exercises, etc
Subject cataloging / Problems, exercises, etc
Online library catalogs / Subject access / Problems, exercises, etc
Online bibliographic searching / Problems, exercises, etc
-
Dewar, M.: Restructuring the Library of Congress Subject Headings : Subject access and bibliographic instruction: two sides of the OPAC problem (1988)
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- Imprint
- Halifax, N.S. : Dalhousie University, School of Library and Information Studies
-
Lester, M.A.: Coincidence of user vocabulary and Library of Congress Subject Headings : experiments to improve subject access in academic library online catalogs (1989)
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- Imprint
- Urbana-Champaign : Univ. of Illinois
-
McCarthy, C.: ¬A reference librarian's view of the online subject catalog (1989)
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- Abstract
- This paper suggests that the cataloging community may be setting its goals too low in its approach to online subject access. Truly effective subject retrieval for online catalog users will not be possible until the Library of Congress gives a higher priority to consistency in the assignment of subject headings. In recognition of the intellectual complexity of LCSH, the paper proposes the appointment of subject specialists to monitor the assignment of subject headings at the Library of Congress.
-
Yee, M.: Headings for tomorrow : public access display of subject headings (1992)
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- Abstract
- This short guide is intended to help librarians and OPAC system designers to make decisions about the design of displays of more than one subject heading. The authors stress that they offer guidance rather than standards or prescriptions; their clear prose is cautious and even the number of recommendations is limited. A 12-page introduction contrasts the "structural approach" and "strict alphabetical approach" to filing, showing examples and stating arguments for each. 7 chapters cover display of subdivisions, inverted headings, display of qualified headings, arrangement of numerical headings, display of subjects interfiled with names and titles, punctuation and messages to the user. Within each chapter, questions involving choices between two or more approaches are followed by brief statements of current practice (LC rules, ALA rules, and systems in existing OPACs) extensive examples demonstrating such choices, and arguments for and against each. The authors warn against ever assuming that the user knows the needed subject headings, and acknowledge that the best OPAC design often depends on the setting and on the user's understanding of the system. Although the topic may be beyond the purview of the authoring committee, the discussion here makes one yearn for interactive OPACs that can analyze the user's needs and provide appropriate guidance to whatever system is adopted
- Editor
- Subcommittee on the Display of Subject Headings in Subject Indexes in OPACs, Subject Analysis Committee, Cataloging and Classification Section, ALCTS, ALA
- Footnote
- Hinweis in: Journal of academic librarianship 18(1993) no.6, S.401
- LCSH
- Online library catalogs / Subject access / Standards / United States
Subject headings, Library of Congress / Evaluation
- RSWK
- Washington <DC> / Library of Congress / Schlagwortkatalogisierung / Online-Katalog (D)
- Subject
- Washington <DC> / Library of Congress / Schlagwortkatalogisierung / Online-Katalog (D)
Online library catalogs / Subject access / Standards / United States
Subject headings, Library of Congress / Evaluation
-
Drabenstott, K.M.: ¬The need for machine-readable authority records for topical subdivisions (1992)
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- Abstract
- This paper recognizes the limitations of the existing file of Library of Congress authority records for subject heading assignment and validation. It makes recommendations for a new machine-readable file of authority records for topical subdivisions and for enhancements to the existing subject authority file. The recommended changes qould enable online systems to assist in subject heading formulation and verify, with limited assistance by human intermediaries, the individual components of subdivided headings. A study of subdivided subject headings in a large bibliographic database forms the basis of the recommendations
-
Crawford, J.C.; Thorn, L.C.; Powles, J.A.: ¬A survey of subject access to academic library catalogues in Great Britain : a report to the British Library Research and Development Department (1992)
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- Abstract
- The study of subject access to UK academic library catalogues was based on a questionnaires end out during Summer 1991. 86 out of a possible 110 questionnaires were returned. All universities and polytechniques now have OPACs which are progressing well towards comprehensive bibliographical coverage of their libraries' stocks. The MARC format is now widely used. Subject access strategies are usually based on either Library of Congress Subject Headings or inhouse indexing systems but almost half the OPACs studies have no separate subject searching option based on subject indexing is expensive and future subject indexing strategies are best based on pre-existing controlled vocabularies. Strategies authority control is essential. A limited range of software strategies is recommended including the need to limit search results
- Imprint
- London : British Library
-
Carlyle, A.: Matching LCSH and user vocabulary in the library catalog (1989)
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- Abstract
- Central to subject searching is the match between user vocabulary and the headings from Library of Congress Subject-Headings (LCSH) used in a library catalog. This paper evaluates previous matching studies, proposes a detailed list of matching categories, and tests LCSH in a study using these categories. Exact and partial match categories are defined for single LCSH and multiple LCSH matches to user expressions. One no-match category is included. Transaction logs from ORION, UCLA's online Information system, were used to collect user expressions for a comparison of LCSH and user language. Results show that single LCSH headings match user expressions exactly about 47% of the time; that single subject heading matches, including exact matches, comprise 74% of the total; that partial matches, to both single and multiple headings, comprise about 21% of the total; and that no match occurs 5% of the time.
-
Mann, T.: ¬The changing nature of the catalog and its integration with other discovery tools. Final report. March 17, 2006. Prepared for the Library of Congress by Karen Calhoun : A critical review (2006)
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- Abstract
- According to the Calhoun report, library operations that are not digital, that do not result in resources that are remotely accessible, that involve professional human judgement or expertise, or that require conceptual categorization and standardization rather than relevance ranking of keywords, do not fit into its proposed "leadership" strategy. This strategy itself, however, is based on an inappropriate business model - and a misrepresentation of that business model to begin with. The Calhoun report draws unjustified conclusions about the digital age, inflates wishful thinking, fails to make critical distinctions, and disregards (as well as mischaracterizes) an alternative "niche" strategy for research libraries, to promote scholarship (rather than increase "market position"). Its recommendations to eliminate Library of Congress Subject Headings, and to use "fast turnaround" time as the "gold standard" in cataloging, are particularly unjustified, and would have serious negative consequences for the capacity of research libraries to promote scholarly research.
- Content
- Stellungnahme zu: Calhoun, K.: The changing nature of the catalog and its integration with other discovery tools.
-
Markey, K.: Searching and browsing the Library of Congress Classification schedules in an online catalogue (1986)
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- Source
- Online public access to library files. Ed.: J. Kinsella
-
Pulis, N.V.; Ludy, L.E.: Subject searching in an online catalog with authority control (1988)
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- Abstract
- Results of previous catalog research indicate that users want improvements in subject searching features, noting display of terms related to their topics as especially desirable. This study reports the findings of an examination of subject searchers' use of such a feature provided through online display of authority information from Library of Congress Subject Headings for terms used in the catalog. It was found that, of the terms entered by users, 78 percent were an exact or close match to catalog terms, and another 14 percent matched "see" references. Although additional information was available for nearly half of the searches performed, it was used in only 28 percent of these cases. It is suggested that improvements in subject searching features are needed to encourage use of available syndetic structures
-
Access project team: ACCESS: new OPAC interfaces at the Library of Congress put a new face on software development (1991)
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-
Losee, R.M.: Improving collection browsing : small world networking and Gray code ordering (2017)
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- Abstract
- Documents in digital and paper libraries may be arranged, based on their topics, in order to facilitate browsing. It may seem intuitively obvious that ordering documents by their subject should improve browsing performance; the results presented in this article suggest that ordering library materials by their Gray code values and through using links consistent with the small world model of document relationships is consistent with improving browsing performance. Below, library circulation data, including ordering with Library of Congress Classification numbers and Library of Congress Subject Headings, are used to provide information useful in generating user-centered document arrangements, as well as user-independent arrangements. Documents may be linearly arranged so they can be placed in a line by topic, such as on a library shelf, or in a list on a computer display. Crossover links, jumps between a document and another document to which it is not adjacent, can be used in library databases to allow additional paths that one might take when browsing. The improvement that is obtained with different combinations of document orderings and different crossovers is examined and applications suggested.
-
Broadbent, E.: ¬The online catalog : dictionary, classified, or both? (1989)
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- Abstract
- The main purpose of the study was to determine if the online catalog can function both as a dictionary and classified catalog without requiring additional time or intellectual effort on the part of the cataloger. A total of 1842 MARC bibliographic records listed in the 370-379 classified section of American Book Publishing Record were studied. These records displayed 2735 subject headings. Of these, 1491 (55%) had a Library of Congress classification number linked to them. An alphabetical and classified index was created using primary subjects and their related classification numbers. While such an index could be a useful browsing device if integrated into an online catalog, creating a bona fide classified catalog would require assigning classification numbers to the secondary subject headings.
-
Pienaar, R.E.: Subject access in OPACs : results of a user survey in a university library (1994)
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- Source
- Finding new values and uses of information: 47th FID Conference and Congress, Sosnic City Omiya, Saitama, Japan, Oct. 5-8 1994. Hrsg.: IFLA
-
Ercegovac, Z.: Minimal level cataloging : what does it mean for maps in the contexts of card catalogs, online catalogs, and digital libraries? (1998)
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- Abstract
- In this article, we examine some of the proposals which have dealt with the problems in cataloging in 2 different technological contexts: printed-card catalogs and online catalogs. We first look at some of the measures which attempted to deal with the 'crisis in cataloging' at the Library of Congress in the 1940s. Then we address some of the current problems in cataloging in the era of OPACs. In particular, we discuss the extent to which minimal-level cataloging, as defines by AACR and implemented in the OCLC database, works for maps. Our discussion is organized around 2 main groups of access points: controlled vocabulary data elements, including name data elements, and free-text data elements. In closing, we discuss prospects that the next generation of online catalogs uisng the Z39.50 protocol and SGML format might offer to minimal-level cataloging for maps
- Source
- Journal of the American Society for Information Science. 49(1998) no.8, S.706-719
-
Gorman, M.: From card catalogues to WebPACs : celebrating cataloguing in the 20th century (2000)
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- Source
- Conference on Bibliographic Control for the New Millennium held in Washington, DC at the Library of Congress, November 2000
-
Li, Y.-O.; Leung, S.W.: Computer cataloging of electronic Journals in unstable Aggregator Databases the Hong Kong Baptist University Library experience (2001)
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- Abstract
- The growth and use of aggregator databases have presented libraries with both new opportunities for collection enhancement and new challenges of bibliographic control. How to integrate full-text electronic journal titles in unstable aggregator databases into a library's OPAC (Online Public Access Catalog) has been an especially taxing matter for libraries. This article describes the Hong Kong Baptist University Library's effort to integrate full-text electronic journal titles from three large, unstable aggregator databases into its INNOPAC-based OPAC. The library's electronic journal computer program (EJCOP) does this in a simple, direct, consistent, and accurate manner and addresses some of the issues elaborated in the January 2000 Final Report of the Task Group on Journals in Aggregator Databases of the Standing Committee on Automation of the Library of Congress Program for Cooperative Cataloging.
- Date
- 10. 9.2000 17:38:22
- Source
- Library resources and technical services. 45(2001) no.4, S.198-211
-
Fujita, M.; Lopes, L.; Moreira, W.; Piovezan dos Santos, L.B.; Andrade e Cruz, M.C.; Rodrigues de Barros Ribas, R.: Construction and evaluation of hierarchical structures of indexing languages for online catalogs of libraries : an experience of the São Paulo State University (UNESP) (2018)
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- Abstract
- The construction and updating of indexing languages depend on the organization of their hierarchical structures in order to determine the classification of related terms and, above all, to allow a constant updating of vocabulary, a condition for knowledge evolution. The elaboration of an indexing language for online catalogs of libraries' networks is important considering the diversity and specificity of knowledge areas. From this perspective, the present paper reports on the work of a team of catalogers and researchers engaged in the construction of a hierarchical structure of an indexing language for an online catalog of a university library's network. The work on hierarchical structures began by defining the categories and subcategories that form the indexing language macrostructure by using the parameters of the Library of Congress Subject Headings , the National Library Terminology and the Vocabulary of the University of São Paulo Library's system. Throughout the stages of the elaboration process of the macrostructure, difficulties and improvements were observed and discussed. The results enabled the assessment of the hierarchical structures of the languages used in the organization of the superordinate and subordinate terms, which has contributed to the systematization of operational procedures contained in an indexing language manual for online catalogs of libraries.
-
Khoo, C.S.G.; Wan, K.-W.: ¬A simple relevancy-ranking strategy for an interface to Boolean OPACs (2004)
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- Abstract
- A relevancy-ranking algorithm for a natural language interface to Boolean online public access catalogs (OPACs) was formulated and compared with that currently used in a knowledge-based search interface called the E-Referencer, being developed by the authors. The algorithm makes use of seven weIl-known ranking criteria: breadth of match, section weighting, proximity of query words, variant word forms (stemming), document frequency, term frequency and document length. The algorithm converts a natural language query into a series of increasingly broader Boolean search statements. In a small experiment with ten subjects in which the algorithm was simulated by hand, the algorithm obtained good results with a mean overall precision of 0.42 and mean average precision of 0.62, representing a 27 percent improvement in precision and 41 percent improvement in average precision compared to the E-Referencer. The usefulness of each step in the algorithm was analyzed and suggestions are made for improving the algorithm.
- Content
- "Most Web search engines accept natural language queries, perform some kind of fuzzy matching and produce ranked output, displaying first the documents that are most likely to be relevant. On the other hand, most library online public access catalogs (OPACs) an the Web are still Boolean retrieval systems that perform exact matching, and require users to express their search requests precisely in a Boolean search language and to refine their search statements to improve the search results. It is well-documented that users have difficulty searching Boolean OPACs effectively (e.g. Borgman, 1996; Ensor, 1992; Wallace, 1993). One approach to making OPACs easier to use is to develop a natural language search interface that acts as a middleware between the user's Web browser and the OPAC system. The search interface can accept a natural language query from the user and reformulate it as a series of Boolean search statements that are then submitted to the OPAC. The records retrieved by the OPAC are ranked by the search interface before forwarding them to the user's Web browser. The user, then, does not need to interact directly with the Boolean OPAC but with the natural language search interface or search intermediary. The search interface interacts with the OPAC system an the user's behalf. The advantage of this approach is that no modification to the OPAC or library system is required. Furthermore, the search interface can access multiple OPACs, acting as a meta search engine, and integrate search results from various OPACs before sending them to the user. The search interface needs to incorporate a method for converting the user's natural language query into a series of Boolean search statements, and for ranking the OPAC records retrieved. The purpose of this study was to develop a relevancyranking algorithm for a search interface to Boolean OPAC systems. This is part of an on-going effort to develop a knowledge-based search interface to OPACs called the E-Referencer (Khoo et al., 1998, 1999; Poo et al., 2000). E-Referencer v. 2 that has been implemented applies a repertoire of initial search strategies and reformulation strategies to retrieve records from OPACs using the Z39.50 protocol, and also assists users in mapping query keywords to the Library of Congress subject headings."
- Source
- Electronic library. 22(2004) no.2, S.112-120
