Search (301 results, page 1 of 16)

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Abstract

The online catalogue can provide the user with efficient and effective access through a variety of access points. New interests in subject heading is indicated. Keyword access and free text searching are considered alternatice methods. An investigation is suggested into the symbiotic relationship between classification and subject heading

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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

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Abstract

For truly effective subject access, it is essential that books on any given topic be brought together consistently under the same subject heading. With the advent of online catalogs, this goal has assumed new importance but has also become easier to achieve

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Abstract

Assigned topical and geographic subject headings from a sample of 3.814 bibliographic records in the University of Michigan Library's catalog were analyzed to determine the degree of match with LCSH, 10th edition and to idetify types of heading conflicts that lend themselves to automatic subject authority control. The findings showed a surprising degree of agreement: 44 percent of headings matched LCSH 10th completely. For headings without subdivisions, the match was 88,4 percent. Since 93,6 percent of the topical subdivisions that did not match LCSH were found on the free-floating lists, some consideration should be given to developing a machine-readable file of free-floating subdivisons for matching purposes.

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Abstract

Describes research into unsuccessful searches of OPACs by analyzing searches and computer messages, explaining how data was collected and analysed in a study at Adelphi University in 1994. Discusses ways of bridging the gap between users' formulations of subjects and the terms used in authority files and subject heading schemes

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Abstract

A survey was conducted during 1987 to identify how online catalog users interact with various aspects of the catalog's authority control structure. Questionnaires were sent to major online catalog system vendors and to selected university libraries and networks known to have developed in-house online catalogs; additional copies were distributed to ACIG meeting participants during the ALA conference in San Francisco, June 1987. Twenty-one usable responses were received, twelve describing commercially available systems and nine from lacally developed systems.

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Source

Database. 16(1993) June, S.102-104

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Footnote

Paper given at CIG Annual Weekend Seminar, Blackpool, UK, June 1996

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Source

Information management report. 1996, June, S.8-9

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Abstract

There are many problems with subject access in online catalogues. One of the major problems is information overload. One kind of this occurs when the display consists of a lengthy segment of the subject index in which a single subject heading is followed by a bewildering array of subdivisons, qualifications and phrases. This problem can be alleviated by presenting the subject index in a summary form that the user can expand to provide more detail as appropriate. Such an approach could be realized within the context of a direct manipulation style of user interface. In particular, a manner of displaying information called 'fisheye views' could be applied to the subject index display

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Abstract

Browse searching of online catalogs and electronic indexes is a popular means of retrieving information, but some subject heading lists are so extensive that browsing them can be difficult and time-consuming. This resaerch tested one way of presenting a browse interface to reduce the amount of scanning of subject headings required. It found that a hierarchical presentation of headings reduced the amount of scanning required by more than 50% without any reduction in the effectiveness of the search. Better browsable displays of this sort can improve the efficiency of searching but appear not to alter effectivenenss

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Abstract

Surveys the status of catalguing practice in university libraries in 3 Asian developing countries, Pakistan, Malaysia, and Saudia Arabia. Examines the extent of the usage of international cataloguing tools such as cataloguing codes (AACR, ISBD), classification schemes (DDC, LCC) and subject heading lists (Sears, LCSH). Results indicate that there is an overall uniformity in the use of such tools, with a trend towards automation of cataloguing services with more access points for catalogue searching. Online catalogues are also replacing all traditional catalogue forms (card, printed, and microform). Findings show that, in using information technology in technical services, Malaysian university libraries are more advanced than those of Pakistan and Saudi Arabia

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Abstract

Authority control is discussed from two viewpoints: The need for bibliographic records relating to a name to be brought together under one form of the name; and the need for cross references to direct a user to a heading from variant forms of the name. Data from two research projects that support the need for choosing one form of name are summarized. The author's study of user requests that resulted in no "hits" in an online catalog is described. Data are given to show that for only 6.4% of these requests would our current methods of cross referencing in authority records have been helpful, and that two system programs would have given much greater assistance.

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Abstract

An exploratory research study on OPACs was done within the framework of the French PARINFO program by four different teams: ENSSIB-CERSI, City Univ. of London, Médiathèque of the Cité des Sciences et de l'industrie and a firm GSI-ERLI. During the month of June 1992, 650 individual searches on four terminals were collected. The sessions were automatically recorded, accompanied by two online questionnaires, a pre-search and a post-search questionnaire. Some questions were asked orally by an interviewer and the answers noted. The article analyses the researches perceived by user as difficult or impossible. Some examples of the difficulties are given

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Source

Vine. 1995, no.99, June, S.32-37

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Content

Presentation given at a French Librarians Association study day on 'The future of cataloguing / Catalogues of the future', held in June 1996 at the BNF

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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

Reports results of a questionnaire survey of UK academic libraries to determine the level of use of online public access catalogues (OPACs) and the development of inhouse subject indexes. 75 respondents reported having commercial systems and 7 reported inhouse systems. Data includes: named systems in use and numbers of libraries using each system; percentages of bibliographic records in machine readable format; types of materials; and record formats (UKMARC, LCMARC etc.) Reports the most common access points for searching the OPACs (author, keyword), methods of generating terms to be used for subject searching, subject heading sources (LCSH, MeSH, PRECIS) and classification schemes (Dewey (DDC), UDC). Results show that all universities and polytechnics now have OPACs and only the smaller colleges do not. OPACs are moving towards comprehensive covergae of academic library stocks with the MARC record the most popular format. The 3 main subject access strategies involve: LCSH, inhouse strategies, and strategies not based on controlled terminolgy. Draws heavily on the results of an earlier survey by Fran Slack (Vine 72(1988) Nov., S.8.12)