Search (375 results, page 1 of 19)

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Abstract

The purpose of this selected bibliography is to introduce issues and problems in relation to thesaurus construction and to present a set of readings that may be used in practical thesaurus design. The concept of thesaurus is discussed, the purpose of the thesaurus and how the concept has evolved over the years according to new IR technologies. Different approaches to thesaurus construction are introduced, and readings dealing with specific problems and developments in the collection, formation and organisation of thesaurus concepts and terms are presented. Primarily manual construction methods are discussed, but the bibliography also refers to research about techniques for automatic thesaurus construction.

Date

18. 5.2006 20:06:22

Footnote

Auch in: The thesaurus: review, renaissance and revision. Ed. by S.K. Roe u. A.R. Thomas. Binghamton: Haworth 2004.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Date

15. 3.2000 10:22:37

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Date

1. 8.1996 22:01:00

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

Describes the backgroud to the construction of a thesaurus at Hydro-Quebec, Quebec, Canada. Several information units, linked to form a network, share the same bibliographic database. The need for coherence and efficiency was the principle motive for the construction of the multidisciplinary thesaurus. Describes the construction process, discusses the specifity of the tool, its circulation, and considers its use on a partnership basis with other information services

Footnote

Übers. des Titels: The development of an information tool at Hydro-Quebec: the HQ Thesaurus

Source

Argus. 26(1997) no.3, S.16-22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Source

Mitteilungen der Arbeitsgemeinschaft der Parlaments- und Behördenbibliotheken. 1989, H.67, S.1-22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

The application of thesauri in networked environments is seriously hampered by the challenges of introducing new concepts and terminology into the formal controlled vocabulary, which is critical for enhancing its retrieval capability. The author describes an automated process of adding new terms to thesauri as entry vocabulary by analyzing the association between words/phrases extracted from bibliographic titles and subject descriptors in the metadata record (subject descriptors are terms assigned from controlled vocabularies of thesauri to describe the subjects of the objects [e.g., books, articles] represented by the metadata records). The investigated approach uses a corpus of metadata for scientific and technical (S&T) publications in which the titles contain substantive words for key topics. The three steps of the method are (a) extracting words and phrases from the title field of the metadata; (b) applying a method to identify and select the specific and meaningful keywords based on the associated controlled vocabulary terms from the thesaurus used to catalog the objects; and (c) inserting selected keywords into the thesaurus as new terms (most of them are in hierarchical relationships with the existing concepts), thereby updating the thesaurus with new terminology that is being used in the literature. The effectiveness of the method was demonstrated by an experiment with the Chinese Classification Thesaurus (CCT) and bibliographic data in China Machine-Readable Cataloging Record (MARC) format (CNMARC) provided by Peking University Library. This approach is equally effective in large-scale collections and in other languages.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

Describes the development and structure of a multilingual thesaurus for classifying and defining musical instruments, designed at the Brussels Theatre de la Monnaie as part of a project to create a multimedia database of theatre and musical arts

Date

1. 8.1996 22:01:00

Footnote

Übers. d. Titels: A new multilingual thesaurus for musical instruments

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Source

Information und Märkte: 50. Deutscher Dokumentartag 1998, Kongreß der Deutschen Gesellschaft für Dokumentation e.V. (DGD), Rheinische Friedrich-Wilhelms-Universität Bonn, 22.-24. September 1998. Hrsg. von Marlies Ockenfeld u. Gerhard J. Mantwill

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Footnote

Übers. d. Titels: Statistical filtering techniques applied to the obtention of hierarchical relationships in the automatic construction of a thesaurus

Source

Revista Española de Documentaçion Cientifica. 22(1999) no.1, S.34-49

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

After a period of experiment and evolution in the 1950s and 1960s, a fairly standard format for thesauri was established with the publication of the influential Thesaurus of Engineering and Scientific Terms (TEST) in 1967. This and other early thesauri relied primarily an the presentation of terms in alphabetical order. The value of a classified presentation was subsequently realised, and in particular the technique of facet analysis has profoundly influenced thesaurus evolution. Thesaurofacet and the Art & Architecture Thesaurus have acted as models for two distinct breeds of thesaurus using faceted displays of terms. As of the 1990s, the expansion of end-user access to vast networked resources is imposing further requirements an the style and structure of controlled vocabularies. The international standards for thesauri, first conceived in a print-based era, are badly in need of updating. Work is in hand in the UK and the USA to revise and develop standards in support of electronic thesauri.

Date

22. 9.2007 15:46:13

Footnote

Auch in: The thesaurus: review, renaissance and revision. Ed. by S.K. Roe u. A.R. Thomas. Binghamton: Haworth 2004.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Date

1. 8.1996 22:01:00

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Date

24. 8.2005 19:20:22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

This 1993 edition is the authoritative guide constructing single-language thesauri, one of the most powerful tools for information retrieval. Written by experts, Z39.19 shows how to formulate descriptors, establish relationships among terms, and present the information in print and on a screen. Also included are thesaurus maintenance procedures and recommended features for thesaurus management systems

Footnote

Rez. in: Knowledge organization 22(1995) no.3/4, S.180-181 (M. Hudon)

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

The patterns of overlap between terms which are closely related in a thesaurus are considered. The relationships considered are parent/child, in which one term is a broader term of the other, and sibling in which to 2 terms share the same broader term. The patterns of overlap observed in the MeSH thesaurus with respect to selected MEDLINE postings are examined. The implications of the overlap patterns are discussed, in particular, the impact of the overlap patterns on the potential effectiveness of a proposed algorithm for handling negation is considered.

Date

25.12.1995 22:52:34

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

The present study investigates the ability of a bibliometric based semi-automatic method to select candidate thesaurus terms from citation contexts. The method consists of document co-citation analysis, citation context analysis, and noun phrase parsing. The investigation is carried out within the specialty area of periodontology. The results clearly demonstrate that the method is able to select important candidate thesaurus terms within the chosen specialty area.

Date

8. 3.2007 19:55:22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

This Standard presents guidelines and conventions for the contents, display, construction, testing, maintenance, and management of monolingual controlled vocabularies. This Standard focuses on controlled vocabularies that are used for the representation of content objects in knowledge organization systems including lists, synonym rings, taxonomies, and thesauri. This Standard should be regarded as a set of recommendations based on preferred techniques and procedures. Optional procedures are, however, sometimes described, e.g., for the display of terms in a controlled vocabulary. The primary purpose of vocabulary control is to achieve consistency in the description of content objects and to facilitate retrieval. Vocabulary control is accomplished by three principal methods: defining the scope, or meaning, of terms; using the equivalence relationship to link synonymous and nearly synonymous terms; and distinguishing among homographs.

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

This paper describes a proposal for a new approach to thesaurus design and construction that could have significant implicantions for change in the way multilingual thesauri are handled and integrated with each other. The formula presented here has its origin in the work of the German Thesaurus Committee and has had input from a number of scientists and practitioners int he field. The emphasis is on the various types of relationships found among concepts, notiions and universals in languages. These relationships are analysed and refined beyond the approach taken in existing thesauri. This proposal is very much at the discussion stage and the author invites the assistance of interested readers through criticisms, discussion and dialogue. Applications of the proposed thesaurus are included and the major goal of this proposal is to provide the basis for improved desing and integration of multilingual thesauri

Source

Knowledge organization. 26(1999) no.1, S.10-22

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

With networked information access to heterogeneous data sources, the problem of terminology provision and interoperability of controlled vocabulary schemes such as thesauri becomes increasingly urgent. Solutions are needed to improve the performance of full-text retrieval systems and to guide the design of controlled terminology schemes for use in structured data, including metadata. Thesauri are created in different languages, with different scope and points of view and at different levels of abstraction and detail, to accomodate access to a specific group of collections. In any wider search accessing distributed collections, the user would like to start with familiar terminology and let the system find out the correspondences to other terminologies in order to retrieve equivalent results from all addressed collections. This paper investigates possible semantic differences that may hinder the unambiguous mapping and transition from one thesaurus to another. It focusses on the differences of meaning of terms and their relations as intended by their creators for indexing and querying a specific collection, in contrast to methods investigating the statistical relevance of terms for objects in a collection. It develops a notion of optimal mapping, paying particular attention to the intellectual quality of mappings between terms from different vocabularies and to problems of polysemy. Proposals are made to limit the vagueness introduced by the transition from one vocabulary to another. The paper shows ways in which thesaurus creators can improve their methodology to meet the challenges of networked access of distributed collections created under varying conditions. For system implementers, the discussion will lead to a better understanding of the complexity of the problem

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Abstract

The benefits of a well constructed thesaurus to an information retrieval system have long been recognised by both researchers and practitioners in the field. Examines both early and current approaches to automatic thesaurus construction and describes an approach to the automatic generation of global thesauri based on the term discrimination value model of Salton Yang, and Yu and on an appropriate clustering algorithm. This method has been implemented and applied to 2 document collections. Preliminary results indicate that this method, which produces improvements in retrieval performance in excess of 10 and 15% in the test collections, is viable and worthy of continued investigation.

Date

22. 4.1996 3:39:53

Theme

Konzeption und Anwendung des Prinzips Thesaurus

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Date

22. 9.1997 19:16:05

Object

Art and Architecture Thesaurus
Thesaurus of Geographic Names

Theme

Konzeption und Anwendung des Prinzips Thesaurus