Search (122 results, page 6 of 7)

  • × theme_ss:"Verbale Doksprachen im Online-Retrieval"
  • × type_ss:"a"
  1. Turquet, B.: Que faire de Rameau? : Ou comment faire avec Rameau? (1997) 0.00 
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    Abstract
    Contribution to the ongoing debate on the French subject headings list RAMEAU, which has been much criticised as time consuming and inflexible. Proposed technical solutions to recurring problems with complex syntax, strucutre of hierarchical and associative links, and rigity of language are discussed, in the context of computerised cataloguing and retrieval using OPACs. As a universal indexing language RAMEAU is more appropriate for medium sized specialised libraries and specialist researchers. However the 2 possible subject indexing techniques, linguistic treatment of whole text and thesaurus, are now beginning to be viewed as complementary approaches
    Type
    a
  2. Lopes, M.I.: Principles underlying subject heading languages : an international approach (1996) 0.00 
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    Abstract
    Discusses the problems in establishing commonly accepted principles for subject retrieval between different bibliographic systems. The Working Group on Principles Underlying Subject Heading Languages was established to devise general principles for any subject retrieval system and to review existing real systems in the light of such principles and compare them in order to evaluate the extent of their coverage and their application in current practices. Provides a background and history of the Working Group. Discusses the principles underlying subject headings and their purposes and the state of the work and major findings
    Type
    a
  3. Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992) 0.00 
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    Abstract
    Experimental evidence suggests that enhancing the subject content of OPAC records can improve retrieval performance. This is based on the use of natural language index terms derived from the table of contents and back-of-the-book index of documents. The research reported here investigates the alternative approach of translating these natural language terms into controlled vocabulary. Subject queries were collected by interview at the catalogue, and indexing of the queries demonstrated the impressive ability of PRECIS, and to a lesser extent LCSH, to represent users' information needs. DDC performed poorly in this respect. The assumption was made that an index language adequately specific to represent users' queries should be adequate to represent document contents. Searches were carried out on three test databases, and both natural language and PRECIS enhancement of MARC records increased the number of relevant documents found, with PRECIS showing the better performance. However, with weak stemming the advantage of PRECIS was lost. Consideration must also be given to the potential advantages of controlled vocabulary, over and above basic retrieval performance measures
    Type
    a
  4. McJunkin, M.C.: Precision and recall in title keyword searching (1995) 0.00 
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    Abstract
    Investigates the extent to which title keywords convey subject content and compares the relative effectiveness of searching title keywords using 2 search strategies to examine whether adjacency operators in title keyword searches are effective in improving recall and precision of online searching. Title keywords from a random sample of titles in the field of economics were searched on FirstSearch, using the WorldCat database, which is equivalent in coverage to the OCLC OLUC, with and without adjacency of the keywords specified. The LCSH of the items retrieved were compared with the sample title subject headings to determine the degree of match or relevance and the values for precision and recall were calculated. Results indicated that, when keywords were discipline specific, adjacency operators improved precision with little degradation of recall. Systems that allow positional operators or rank output by proximity of terms may increase search success
    Type
    a
  5. Bodoff, D.; Kambil, A.: Partial coordination : I. The best of pre-coordination and post-coordination (1998) 0.00 
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  6. Cochrane, P.A.: Improving LCSH for use in online catalogs revisited : What progress has been made? What issues still remain? (2000) 0.00 
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    Abstract
    In 1986 Libraries Unlimited published Cochrane's book, Improving LCSH for Use in Online Catalogs; Exercises for Self-Help with a Selection of Background Readings. This was preceded in 1981 by an ERIC publication (ED 208 900) by Cochrane, with Monika Kirtland Bibliographic and Bibliometric Essay which documented critical views of LCSH and an analysis of vocabulary control in LCSH (parts of which were published in Cataloging & Classification Quarterly' 1(2/3) (1982), 71-94). Three features of LCSH will be re-examined to check on progress since the time of these earlier publications: notes, structure of relationships between headings in the list, and links between Library of Congress classification numbers and LCSH or other vocabularies
    Type
    a
  7. Lucarelli, A.; Viti, E.: Florence-Washington round trip : ways and intersections between semantic indexing tools in different languages (2015) 0.00 
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  8. Wilkens, K.: Drei Sätze zur Idee einer integrierten Formal-und Sacherschließung in Datenbanken (1995) 0.00 
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  9. McIlwaine, I.C.: Subject control : the British viewpoint (1995) 0.00 
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  10. Chan, L.M.: Subject access systems in the USA (1995) 0.00 
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  11. Takeda, N.: Problems in hierarchical structures in thesauri : their influences on the results of information retrieval (1994) 0.00 
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  12. Weidemüller, H.U.: Sinn und Unsinn von Ketten im OPAC (1996) 0.00 
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  13. Scheven, E.; Wening, M.F.: Zeitretrieval in der verbalen Inhaltserschließung (2018) 0.00 
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  14. Bisig, U.: OPAC und verbale Sacherschließung : ein Beitrag zur RSWK-Diskussion (1994) 0.00 
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  15. Expertenteams RDA-Anwendungsprofil für die verbale Inhaltserschließung (ET RAVI): Qualitätskriterien und Qualitätssicherung in der inhaltlichen Erschließung : Thesenpapier (2021) 0.00 
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  16. Lepsky, K.: RSWK - und was noch? : Stellungnahme zum Bericht 'Sacherschließung in Online-Katalogen' der Expertengruppe Online-Kataloge (1995) 0.00 
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  17. Studwell, W.E.: Of eggs and baskets : getting more access out of LC Subject Headings in an online environment (1991) 0.00 
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  18. Lorenzo, L.; Mak, L.; Smeltekop, N.: FAST Headings in MODS : Michigan State University libraries digital repository case study (2023) 0.00 
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  19. Walsh, J.: ¬The use of Library of Congress Subject Headings in digital collections (2011) 0.00 
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    Abstract
    Purpose - This paper attempts to explain the wide dissemination of Library of Congress Subject Headings (LCSH) within digital libraries and presents some of the advantages and disadvantages of using this controlled vocabulary in digital collections. The paper also presents other classifications used in digital collections for subject access and explores ways of improving search functionality in digital collections that employ LCSH. Design/methodology/approach - Unlike traditional libraries that use Library of Congress Classification for organization and retrieval, digital libraries use metadata forms for organization and retrieval. The collections exist in cyberspace of the internet which is known for containing the universe of knowledge. The use of LCSH for information retrieval has been widely criticized for its difficulty of use and its information retrieval effectiveness in online environments. The Library of Congress (LOC) has claimed the headings were not based on comprehensive principles nor ever intended to cover the universe of knowledge. Despite these claims and criticisms, LCSH is the most popular choice for subject access in digital libraries. Findings - The number of digital collections increases every year and LCSH is still the most popular choice of controlled vocabulary for subject access. Of the numerous criticisms, difficulties of use and user unfamiliarity are the greatest disadvantages of using LCSH for subject access. Average users only have a vague notion of what they are looking for when initializing a search. More work is required in automated generation of subject headings and increased usage of LCSH in faceted search retrieval systems. This will provide users with better access to the LCSH used in the back end of information retrieval. Originality/value - The Greek researchers who developed the Dissertation DSPace system believe this type of module will eventually replace the traditional keyword-based indexing back ends employed by many information retrieval modules within current digital library systems. The system offers the type of access and interactivity that will acquaint users with how LCSH looks and is used. Faceted search and automated pattern matching using an ontology based on LCSH have the best promise of overcoming the disadvantages that have always plagued the LOC-controlled vocabulary. These retrieval techniques give LCSH an opportunity to finally achieve the optimal precision and recall it has so far failed to deliver.
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  20. Svenonius, E.: Präkoordination - ja oder nein? (1994) 0.00 
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