Search (1980 results, page 3 of 99)

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LCSH

Subject headings / Information technology
Subject headings / Electronic data processing

Subject

Subject headings / Information technology
Subject headings / Electronic data processing

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Abstract

Spansih subject headings can be used when searching ILLINET Online. Although Spanish language Bilindex subject headings have been available for more than a decade, the library literature has virtually ignored their existence. Provides a brief introduction to these headings, identifies several Illinois libraries which currently assign them, and presents some examples. Surveys various prospects and problems associated with their use

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Abstract

Sears List of Subject Headings (Miller and McCarthy 2010), first published in 1923, is now in its 20th edition. Like most subject headings lists, apart from being a list of preferred (and non-preferred) headings, it also provides patterns, clear instructions, and examples for coining new subject headings not explicitly listed. Key headings form a vital part of the system of coining new headings. It is proposed that more key headings should be designated. Some candidate headings are described. One far-reaching provision seems to be the use of a subdivision of a preferred heading with all of its NTs. Thus, every preferred heading is a potential key heading for all of its NTs. This proposal works on the principle that what is true of a class is true of its narrower classes of all types. Applying this principle will enormously enhance the capacity of the List without adding even an iota to its text and size.

Object

Sears List of Subject Headings

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Abstract

Scope notes from Library of Congress Subject Headings are examined for 1) adherence to principles enunciated in the introduction to the list; 2) peculiarities of subject headings associated with such notes; 3) the structure of the notes; and 4) typical patterns associated with certain categories of subject headings. Scope notes are shown to enable catalogers to apply subject headings consistently and readers to distinguish related headings knowledgeably.

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Abstract

Spanish is one of the most widely spoken languages in the world and a review of the lists of subject headings in this language reveals numerous efforts over a period of time, usually involving some form of collaboration, but largely isolated from each other. Technological developments suggest that a greater degree of cooperation is now possible and would be beneficial to the international library community if other barriers can be surmounted. The lcsh-es.org project demonstrates this concept in a practical way and suggest a new model for international cooperation in authority control. The site may be accessed at http://lcsh-es.org.

Content

Beitrag während: World library and information congress: 74th IFLA general conference and council, 10-14 August 2008, Québec, Canada. Vgl. auch: http://www.ibiblio.org/fred2.0/wordpress/?p=20 (mit Grafik der Beziehung zwischen 'mammal' und 'doorbell')

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LCSH

Subject headings

Subject

Subject headings

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

Pauline Cochrane and Monika Kirtland's "Critical views of LCSH-Library of Congress Subject Headings: a bibliographic and bibliometric essay" published in 'Cataloging & classification quarterly 1(1982) S.71-93' has been widely cited as a source for discussion and complaints about LCSH. Cochrane and Kirtland cover the literature from 1944-1979. The present work provides a critique of the Cochrane/Kirtland study and a survey of the literature concerning the LCSHs during the 1980s. The classified bibliography is arranged according to the format of the Cochrane/Kirtland study to facilitate comparison. Criticism of LCSH reiterates the same points over and over again, whether it is sparseness, bias or currency of the subject headings. Significant trends which emerged in the 1980s include an increased emphasis on the use of LCSH as an online searching tool, concern for the syndetic structure of LCSH and the role of subdivisions, as well as repeated calls for the development of coherent standards to ensure LCSH evolves and is applied in a consistent manner

Footnote

Vgl. auch den Vorgänger: Kirtland, M., P.A. Cochrane: Critical views of LCSH - Library of Congress Subject Headings: a bibliographic and bibliometric essay. In: Cataloging and classification quarterly. 1(1982) no.2/3, S.71-93. und den Nachfolger: Fischer, K.S.: Critical views of LCSH, 1990-2001: the third bibliographic essay. In: Cataloging and classification quarterly. 41(2005) no.1, S.x-xx.

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Abstract

Describes a consultancy project for the development of a health care thesaurus involving the movement of text between different application programs. The thesaurus was built from existing text within the organisation originating from 3 sources: natural language registry file headings; descriptions from an internal business directory and a controlled vocabulary. The software used was WordPerfect and Cardbox

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Field

Lebensmittel und Ernährung

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Abstract

Describes the Hebrew subject headings developed by the staff of the Hebrew Cataloguing Department, Bar-Ilan Univ. Library, Israel. The history of the development of the subject headings is followed by a discussion of how the library began assigning subject headings. Discusses the problems of translating and adapting LCSH and creating new subject headings in Hebrew

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Abstract

This article explores how best to use lexical and statistical translation evidence together for cross-language information retrieval (CLIR). Lexical translation evidence is assembled from Wikipedia and from a large machine-readable dictionary, statistical translation evidence is drawn from parallel corpora, and evidence from co-occurrence in the document language provides a basis for limiting the adverse effect of translation ambiguity. Coverage statistics for NII Testbeds and Community for Information Access Research (NTCIR) queries confirm that these resources have complementary strengths. Experiments with translation evidence from a small parallel corpus indicate that even rather rough estimates of translation probabilities can yield further improvements over a strong technique for translation weighting based on using Jensen-Shannon divergence as a term-association measure. Finally, a novel approach to posttranslation query expansion using a random walk over the Wikipedia concept link graph is shown to yield further improvements over alternative techniques for posttranslation query expansion. Evaluation results on the NTCIR-5 English-Korean test collection show statistically significant improvements over strong baselines.

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Abstract

This study investigates how computational overhead for topic model training may be reduced by selectively removing terms from the vocabulary of text corpora being modeled. We compare the impact of removing singly occurring terms, the top 0.5%, 1% and 5% most frequently occurring terms and both top 0.5% most frequent and singly occurring terms, along with changes in the number of topics modeled (10, 20, 30, 40, 50, 100) using three datasets. Four outcome measures are compared. The removal of singly occurring terms has little impact on outcomes for all of the measures tested. Document discriminative capacity, as measured by the document space density, is reduced by the removal of frequently occurring terms, but increases with higher numbers of topics. Vocabulary size does not greatly influence entropy, but entropy is affected by the number of topics. Finally, topic similarity, as measured by pairwise topic similarity and Jensen-Shannon divergence, decreases with the removal of frequent terms. The findings have implications for information science research in information retrieval and informetrics that makes use of topic modeling.

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Issue

Vol.1: List of headings. Vol.2: Keyword index.

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Abstract

Two proposals are presented which affect the Library of Congress's subject headings for art: abandonment of the structure used in headings like "Art, French" and assignment of genre headings for some types of reproductions of an artist's work.

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Abstract

The Technical Services Committee of the Women's Studies Section, Association of College and Research Libraries, investigated the assignment of subject headings (LCSH) to core works in women's studies. Annotations for the works were compared with subject headings on OCLC cataloguing copy, mainly created by the Library of Congress. Identifies inadequates and traces them to 3 sources: inadequacies in terminology (sexist langugae, limited and biased concepts and imprecise headings); complexities of assigning headings in interdisciplinary and / or emerging fields; and standard cataloguing practices. Lists sample concepts and existing established LCSH missing lacking in bibliographical records and sample concepts lacking adequate established subject headings. Presents recommendations for remedying these problems

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Abstract

Many kinds of structure can be discerned in the headings and rules governing the Library of Congress Subject Headings. By addressing these structures at different levels, librarians can develop different approaches to the machine-assisted validation of subject headings, from the checking of individual words to the validation of complex forms of heading/subdivision compatibility. Using computer programs to assist with maintenance of subject headings is becoming increasingly necessary as technical services librarians strive to create consistent and useful patterns of subject collocation in library catalogs

Source

The LCSH century: one hundred years with the Library of Congress Subject Headings system. Ed.: A.T.Stone