Search (68 results, page 2 of 4)

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Date

23. 3.2000 15:22:58

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Abstract

OLIVE, a transaction logging facility enhanced with online questionnaires, was used to collect data from users of public and academic library catalogues. The comparative analysis of subject searching behaviour focused on the role of browsing subject headings and brief references in search formulation. Opportunities for browsing are greatly constrained by indexing practices. It is suggested that a more integrated approach to pre-coordinate and post-coordinate searching would be more effective. The logging software has been developed for a number of commercial online catalogues including Geac, CLSI and LIBERTAS. The use of a diagnostic and monitoring tool in the evaluation of OPACs is advocated

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Abstract

Introducess a new approach to display retrieved subject headings in subject searching designed to encourage users to browse bibliographic information. Emphasizes the importance of the exact display approach by showing how many user queries could be candidates for this approach, demonstrates an implementation of the exact-display approach in an experimental online catalogue. End user experiences gives opportunities to make recommendations for enhancing the original design of the exact display approach so that future implementations of this approach in operational online catalogues are responsive to the needs of online catalogue users

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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

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Abstract

Current online catalogs have problems providing reasonable subject access, often resulting in searches with too few or too many hits. These problems can be improved by enhancing MARC records, building semantic networks through cross-references, and linking subject headings to classification numbers. This paper describes a pilot project to design a hypertext search engine using these principles

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Date

22. 4.1996 20:07:57

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Date

22. 4.1996 20:07:57

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Abstract

Research conducted in the early 80's has shown that subject access is still one of the most dominant approaches in OPACs. However, while some of the subject searches result in no recall, others often retrieve so much that users are discouraged to proceed further. These and other problems were investigated and solutions were found in improving search methods (such as word stemming, extending search to full bibliographical record and providing end user thesaurus) and indexing techniques (such as ny enhancing subject headings with table of contents and back of the book indexes or by traditional systems). More recent research indicates that the real answer to the question of 'precision without sacrificing recall' lies in the developing 'user friendly novel interfaces' and also in designing 'knowledge based systems', wherein sers would not be expected to learn query formulation or even to be familiar with the indexing language of the system. Several interesting studies and research projects on the subject have produced a whole gamut of information, but one can still visualise the evolving trends of research vis-a-vis their future prospects as possible solutions

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Abstract

Subject queries were extracted from 3 universities' online catalogues and analysed to determine the extend to which they matched subject headings in the LCSH. Computer analyses show that nearly 25% of the subject queries entered by online catalogue users are exact matches of LCSH. Yet, manual analyses show that, even though a user matches or closely matches LCSH-mr, the citations retrieved by this vocabulary are not necessarily satisfactory. Sometimes the closest LCSH-mr is not at all pertinent to a user's topic of interest. This study presents reasons why close matches of LCSH-mr are not always satisfactory and suggests approaches to finding the best matches of the catalogue's controlled vocabulary

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Abstract

The paper will discuss the impact on cataloging standards and bibliographic data formats and will point into the direction of a new cataloging environment with different access point accordings to the information requirements of the users. The present subject headings and classification schemes used to index library materials have to be considered obsolete. The aim must be the integration of existing thesauri accepted and used by the acedemic community by utilizing a 'meta language' as a software engineering tool. This 'meta language' will offer access points by means of different facets focusing the information stored, and these facets will be interactivelyselected by the user supporting the demands of his academic field and retrieval practice

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Abstract

Reports results of analysis and comparison of full level displays of bibliographic records in 36 North American online catalogues for 5 monographs, for both layout and content, with the ISBD and traditional catalogue carddisplay practive for headings and tracings. Presents a taxonomy of display characteristics found in the sample, including: completeness; visual layout; data sequence; label specifity; and integration of description and access points. Discusses the relationship of display technology and practice to current standards for creating catalogue records, emphasizing the need for content standards reflecting the modular nature of computerized records. Concludes that future OPAC displays will resemble card catalogue records less and less, both visually and in structure and content, and points to the need for further research to gather the information needed to make the transition as smooth as possible

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Abstract

Reports results of an analysis of 205 randomly selected records from the OCLC OLUC, to test the assumption that online catalogues have greatly improved subject searching capabilities, over card catalogues, by making other fields in the records searchable as subject access points (SAPs). Results showed considerable overlap (duplication) among the SAPs provided by the title, subject heading and classification number fields. On average, little more than 4 unique, unduplicated access points were found per record. Where title and classification number fields do add some access points not provided by subject headings, the increase is less than many librarians might be expected. Suggests that OPACs might outperform catalogues more in precision than in recall by allowing greater discrimination in searching; terms from different fields may be combined; titles offer greater specifity; searches can be limited by date, language or other criteria

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Abstract

The use of title words, the combination of these through the use of logic operators, and the possibility of truncating them when carrying out subject searches, are some of the search options that have been incorporated into the online catalog. Several arguments in favor of these options have been expressed which state that they represent an approach for the use of natural language and that they facilitate information retrieval. However, expressed arguments against them that support the necessity of using controlled language to obtain more precision in search results also exist. This paper reports the main results from a study whose objective was to compare advantages and disadvantages of retrieval by keywords from the title and by subject headings included in the records of LIBRUNAM, an online catalog containing records for English and Spanish items at the National Autonomous University of Mexico.

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Abstract

This paper examines the need for increased subject catalog access to imaginative literature, focusing on the environment of the academic/research library. New trends in scholarship have created more need for such subject access. We can develop a basis for subject access to imaginative literature by examining the historical treatment of imaginative literature and by drawing upon the past and present work of librarians, other information professionals such as indexers, and literary scholars. While many information professionals have recognized a need for increased subject access to individual works of imagination, there has been no clear consensus on how to do this. This paper represents a step forward in that direction, showing how we might use LCSH to express the themes or topics of an imaginative work. It is important that such subject access be multi-dimensional, identifying both concrete and abstract levels of meaning. Using The Scarlet Letter by Nathaniel Hawthorne as an example, it is demonstrated how LC-type subject headings using LC subject terms with genre/form subdivisions can be developed.

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Source

International cataloguing and bibliographic control. 22(1993) no.2, S.23-26

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Content

Enthält die Beiträge: TYCKOSON, D.A.: Enhancing access to information: building catalogs for the future; TYCKOSON, D.A.: The twenty-first century limited: desinging catalogs for the next century; DWYER, J.: Bibliographic records enhancement: from the drawing board to the catalog screen; SYRACUSE, R.O. u. R.K. POYER: Enhancing access to the library's collections: a view from an academic health center library; STUDWELL, W.E.: Of eggs and baskets: getting more access out of LC Subject Headings in an online environment; STEPHENS, I.E.: Getting more out of call numbers: displaying holdings, locations and circulation status; MICCO, M.: The next generation of online public access catalogs: a new look at subject access using hypermedia; SLOAN, B.G.: Remote access: design implications for the online catalog; ENGEL, G.: User instruction for access to catalogs and database on the Internet; BARNES, S. u. J. McCUE: Linking library records to bibliographic databases: an analysis of common data elements in BIOSIS, Agricola and the OPAC; HARWOOD, R.: Adding a nonlibrary campus collection to the library database; CARTER, K., H. OLSEN u. S. AQUILA: Bulk loading of records for microform sets into the online catalogue; DYKEMAN, A. u. J. ZIMMERMAN: The Georgia Institute of Technology Electronic Library: issues to consider; MOLHOLT, P. u. K. FORSYTHE: Opening up information access through the electronic catalog

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Source

Canadian journal of information science. 16(1991) no.4, S.2-22

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Source

OCLC micro. 7(1991) no.6, S.19-22

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Source

LASIE. 28(1997) no.4, S.22-34

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Isbn

3-924659-22-2