Search (4782 results, page 8 of 240)

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Abstract

The subject headings authority file KABA developed in the Warsaw University Library, Poland, is an alphabetical sorted list of entries containing information ordered according to uniform principles. The file is prepared in conformity with the guidelines for subject authority and reference entries (GSARE). 13 subheadings lists have been created to date. A list containing 517 subheadings forms the basis for the full authority file development. Describes ths structure and content of file entry and gives an example of an entry which contains all fields

Footnote

Current state of the KABA subject headings language authority file

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Abstract

Implicit associative relationships among MeSH headings relevant to clinical anatomy were investigated to determine the extent to which they could be characterized, organized, and structured, and the degree to which this process might be automated was assessed

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Abstract

Considers the future of LCSH and whether their viability can be maintained through a written standardization code. Until there is an online substitute for LC subject headings which has been tested on a large scale over a period of time, a successor to the present combination of LC's controlled vocabulary headings plus computerized techniques such as keyword searching is unlikely to emerge

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Abstract

National Library of Medicine's Medical Subject Headings (MeSH) terms for chemical compounds are arranged in 2 trees: for chemical structures; and for pharmacological action. In 1996, indexing policy changes were implemented which affected chemical terminology in the pharmacological action tree. The change also led to the creation of a new field, Pharmacological Action (PA), in the MeSH Vocabulary File Database. Demonstrates practical searching of MEDLINE and related databases using the PA field

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Abstract

To enhance descriptions, cataloguers can add 'enriching' words or phrases to titles, or introduce content-enriched access features to aid subject-based research. Additional and natural language subject headings designed to support, though not replace, controlled language headings can result in enhanced indexing. Analytical cataloguing and double indexing are 2 other means by which readers can gian access to additional bibliographic data. Also examines how online research tool effectiveness can be enhanced by a system of automatic links between descriptors

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Abstract

The number of subject headings for any individual bibliographic record is discussed. Four policy proposals are presented: how many different persons, places, and organisations should be used; how many uses of the same person, place, organisation, or topic should be allowed; an overall policy on secondary headings; how many subjects should be as a general policy.

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LCSH

Subject headings / Architecture

Subject

Subject headings / Architecture

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Abstract

Outlines the aims of the UCLA/OCLC Core Record Pilot Project (UOCRP) to test the assumptions that: the creation of core level cataloguing will take less time than that required for full level cataloguing; and core records will provide sufficient access to materials through their description and through authorized headings for names, subjects, uniform titles and series. Reports results of the study of the record creation phase of the UOCRP. A total of 384 records were created, consisting of 234 core and 150 full (control) records. Approximately half of the core records were coded level K in OCLC, and half level I. Core record creation was found to be significantly faster than control record creation (8,5-17%), depending upon whether learning curves are factored in. Core records created included, on average, 1,52 subject headings and 1,01 name headings each; the control records averaged 2,05 subject headings and 1,59 name headings each. Notes that the importance of these differences for access is unclear. Of the 384 records created, 30 core records and 15 control records, were subsequently used by 91 institutions within 2 months of their creation. Of the 45 used, only 7 were modified (6 core and 1 control). Of the 10 modifications made to these records, only 2 involved the addition of controlled access points. With OCLC support, UCLA will continue to gather use and modification data for a year

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Abstract

A total of 16 classifiers made a subject analysis of a set of books such that some of the books were first classified by the UDC and then indexed with terms from the General Finnish Subject Headings while another set were processed in the opposite order. Finally books on the same subject were either classifies or indexed. The total number of books processed was 581. A comparison was made of the time required for processing in different situations and of the number of classes or subject headings used. The time figures were compared with corresponding data from the British Library (1972) and the Library of Congress (1990 and 1991). The author finds that the contents analysis requires one third, classification one third and indexing obe third of the time, if the document is both classified and indexed. There was a plausible correlation (o.51) between the length of experience in classification and the decrease in the time required for classing. The average number of UDC numbers was 4,3 and the average number of terms from the list of subject headings was 4,0

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Abstract

Scope notes are added to some subject headings in thesauri to make their scope, meaning, usage and history clearer to users. In the thesaurus contained in the first edition of the online user manual for LISA (OUM1), scope notes are used for 7 message types and in one case 15 note patterns are used to express the same meaning. In the second edition (OUM2) the scope notes are expressed more consistently, and are mainly used to indicate indexing errors. Many note in OUM1 refer to the use of terms in the LISA faceted classification scheme, but this schem is not adequately explained in the introductions to either OUM1, OUM2 or the printed versions of LISA. In OUM2 there are few notes for the use of terms in combination; however, terms are still used in combination with guidance being given through USE references. In some cases the notes are unnecessary because extra headings have been added to the thesaurus. Concludes that scope notes are essential to make thesauri effective and easy to use as tools for searching online and printed information services and scope notes should be carefully consructed and added to any term where meaning and use in the database could be ambiguous

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Abstract

Using subject headings for Online Retrieval is an indispensable tool for online system desingners who are developing new systems or refining exicting ones. The book describes subject analysis and subject searching in online catalogs, including the limitations of retrieval, and demonstrates how such limitations can be overcome through system design and programming. The book describes the Library of Congress Subject headings system and system characteristics, shows how information is stored in machine readable files, and offers examples of and recommendations for successful methods. Tables are included to support these recommendations, and diagrams, graphs, and bar charts are used to provide results of data analyses.

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Abstract

This paper recognizes the limitations of the existing file of Library of Congress (LC) subject authority records for subject heading assignment and validation. it makes recommendations for a new file of machine readable authority records for period subdivisions and for enhancements to the existings file of subject authority records. Recommended changes would enable online systems to assist in subject heading formulations and verify, with limited assistance by human intermediaries, the individual components of subdivided headings. The recommendations are timely in view of changes to the forms of period subdivisions that the Library of Congress is studying to facilitate the display of period subdivisions in chronological order. The availability of machine-readable authority records for most period subdivisions would enable online systems to automatically make changes to the forms of period subdivisions in bibliographic records using cross references for previously-used forms in the autority records for the new forms. The paper also discusses issues arising from an enhancement of the existing controlled system of period subdivision. A study of subdivided subject headings in a large bibliographic database forms the basis of the recommendations

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Abstract

Report on experiences with an automated system for additions and amendments to the indexing of newspaper cuttings in the offices of the Dutch 'De Volkskrant newspaper'. The subject file uses some 3.000 headings from the UDC. It requires constant updating

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Abstract

3 ways to improve access to monographs are additional subject headings, analytic added entires and contents notes. Focuses on California State University. Describes the project, the CSU-Chico results and advices upon when to add contents notes

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Abstract

Provides reviews of the best CD-ROMs issued between 1991 and 92 classified under general headings such as social sciences and humanities. Describes the St. Louis public library field-testing CD-ROM workstation set up during the review period

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Abstract

Defines information retrieval and information retrieval languages and compares the various types of controlled vocabularies used: subject headings lists; classification schemes; and thesauri (and classauri)

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Abstract

Provides an overview of the training of intermediaries and end users in the use of online systems and CD-ROM. Concentrates on the training of online searching under the following headings: Why train? Who is being trained? What is being taught? and How to train? Discusses the evaluation of training and outlines future trends in training