Search (31 results, page 2 of 2)

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Abstract

The introduction of computerized post-coordination has solved many of the problems of pre-coordinated subject access. However, the adoption of computerized post-coordination results in the loss of some pre-coordination benefits. Specifically, the effect of hiding terms within the context of others is lost in post-coodination which give lead status to every document term. This results in spurious matches of terms out of context. Library patrons and Internet searchers are increasingly dissatisfied with subject access performance, in part because of unmanageably large retrieval sets. The need to enhance precision and limit the size of retrieval sets motivates this work which proposes partial coordination, an approach which incorporates the advantages of computer search with the ability of pre-coordination to limit spurious partial matches and thereby enhance precision

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Abstract

Partial coordination is a new method for cataloging documents for subject access. It is especially designed to enhance the precision of document searches in online environments. This article reports a preliminary evaluation of partial coordination that shows promising results compared with full-text retrieval. We also report the difficulties in empirically evaluating the effectiveness of automatic full-text retrieval in contrast to mixed methods such as partial coordination which combine human cataloging with computerized retrieval. Based on our study, we propose research in this area will substantially benefit from a common framework for failure analysis and a common data set. This will allow information retrieval researchers adapting 'library style'cataloging to large electronic document collections, as well as those developing automated or mixed methods, to directly compare their proposals for indexing and retrieval. This article concludes by suggesting guidelines for constructing such as testbed

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Source

Subject indexing: principles and practices in the 90's. Proceedings of the IFLA Satellite Meeting Held in Lisbon, Portugal, 17-18 August 1993, and sponsored by the IFLA Section on Classification and Indexing and the Instituto da Biblioteca Nacional e do Livro, Lisbon, Portugal. Ed.: R.P. Holley et al

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Abstract

Considers the subject headings allocated by the Polish National Library. Discusses the advantages and disadvantages of utilisation or rejection of these subject headings, as well as some reasons for changes becoming necessary in specific cases or libraries. Examines issues concerning the Polish National Library's Slownik Jezyka Hasel Przedmiotowych (Dictionary of Subject Headings); their rapid increase, its increasing detail and its usage in and applicability to other libraries

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Abstract

Takes issue with the views of Diego Maltese on the control of terms for subject indexing, as promulgated by GRIS, an Italian body developing a guide and thesauri in this area, for Italian subjects

Content

Bezug zu: Maltese, D.: Sul controllo dei termini di indicizzazione per soggetti: in: Bolletino AIB 37(1997) no.3, S.334-336.

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Abstract

Discusses the work of GRIS, a collaborative project of Italian academic and research libraries, to develop subject heading schemes for Italian libraries, resulting in the recent publication of the 'Guida all'indicizzazione per soggetto'

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Abstract

Describes a utility program designed to generate a permuted keyword index from a CDS/ISIS database. The different keywords which are used to describe the subject content of documents are presented together in a string, thus showing the context in which the lead term is used. Indexes can also be generated for any repeatable field, such as author and report number. The string is rotated from left to right to provide an access from each of the terms used. Pascal is the language used and a step by step tutorial is given to create the necessary databases

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Abstract

The impetus for a large-scale study on subject heading understanding was a recommendation of the Library of Congress (LC) Subject Subdivisions Conference that suggested standardizing the order of subject subdivisions for the purpose of simplifying subject cataloging. This paper focuses on unexpected large-scale study findings about multiple meanings for subdivided subject headings and the effects that changes of meaning for different orders of subdivisions had on the meanings that end users and librarians provided to subdivided subject headings. Findings about changes of meaning in subdivided subject headings did not dissuade the authors regarding their recommendation that the library community adopt a standard order of subdivisions. The authors also give suggestions for additional studies of subject heading understanding that build on this one.

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Abstract

A decision must be made about the selection of a system of subject headings for the Library Service of the Western Cape in South Africa. Describes the advantages and disadvantages of the LCSH and of the Provincial Library Service of the Western Cape Subject Indes with a request to users to provide feedback about the preferred system

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Abstract

A subject indexing language (SIL) is an artificial language used for formulating names of subjects and is composed of (a) a vocabulary, (b) a list of elementary categories, and (c) the rules of syntax. A string indexing language is an SIL, whose expressions are multiple overlappimg index entries, constructed accordingly to explicit syntax rules. PRECIS, developed by Austin, and POPSI, developed by Bhattacharyya, are two such string indexing languages. DSIS is a more versatile version of the POPSI system, developed by Devadason. There have been several attempts to compare and evaluate the superiority of one system over another, with the exception that none of these tried to compare their performances from the searcher's point of view. This present study tries to compare the efficiency and effectiveness of printed subject indexes produced by PRECIS and DSIS on a non-empirical basis and based on the following five major characteristics of index entries identified by Craven as desirable from the searcher's viewpoint: (1) predicitibility, (2) collocation, (3) clarity, (4) succinctness, and (5) eliminability. A representative sample of 600 documents (both macro and micro), chosen from three different social science subject fields, has been used as the test data. The main points of discussion are (a) the term structure, (b) the term relationships, and (c) the entry structure, generated by the two systems. On the whole, a PRECIS index performs better than a DSIS index in terms of most of the above characteristics. It has been concluded that the user will search the former more efficiently and effectively than the latter