Search (35 results, page 1 of 2)

  • × theme_ss:"Verbale Doksprachen im Online-Retrieval"
  1. Tudhope, D.; Binding, C.; Blocks, D.; Cuncliffe, D.: Representation and retrieval in faceted systems (2003) 0.03 
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    Abstract
    This paper discusses two inter-related themes: the retrieval potential of faceted thesauri and XML representations of fundamental facets. Initial findings are discussed from the ongoing 'FACET' project, in collaboration with the National Museum of Science and Industry. The work discussed seeks to take advantage of the structure afforded by faceted systems for multi-term queries and flexible matching, focusing in this paper an the Art and Architecture Thesaurus. A multi-term matching function yields ranked results with partial matches via semantic term expansion, based an a measure of distance over the semantic index space formed by thesaurus relationships. Our intention is to drive the system from general representations and a common query structure and interface. To this end, we are developing an XML representation based an work by the Classification Research Group an fundamental facets or categories. The XML representation maps categories to particular thesauri and hierarchies. The system interface, which is configured by the mapping, incorporates a thesaurus browser with navigation history together with a term search facility and drag and drop query builder.
  2. Milstead, J.L.: Thesauri in a full-text world (1998) 0.03 
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    Date
    22. 9.1997 19:16:05
    Imprint
    Urbana-Champaign, IL : Illinois University at Urbana-Champaign, Graduate School of Library and Information Science
    Source
    Visualizing subject access for 21st century information resources: Papers presented at the 1997 Clinic on Library Applications of Data Processing, 2-4 Mar 1997, Graduate School of Library and Information Science, University of Illinois at Urbana-Champaign. Ed.: P.A. Cochrane et al
  3. Dykstra, M.: PRECIS in the online catalog (1989) 0.02 
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    Theme
    Preserved Context Index System (PRECIS)
  4. Cousins, S.A.: Enhancing subject access to OPACs : controlled vocabulary vs. natural language (1992) 0.02 
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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
  5. O'Neill, E.T.; Bennett, R.; Kammerer, K.: Using authorities to improve subject searches (2012) 0.02 
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    Abstract
    Authority files have played an important role in improving the quality of indexing and subject cataloging. Although authorities can significantly improve search by increasing the number of access points, they are rarely an integral part of the information retrieval process, particularly end-users searches. A retrieval prototype, searchFAST, was developed to test the feasibility of using an authority file as an index to bibliographic records. searchFAST uses FAST (Faceted Application of Subject Terminology) as an index to OCLC's WorldCat.org bibliographic database. The searchFAST methodology complements, rather than replaces, existing WorldCat.org access. The bibliographic file is searched indirectly; first the authority file is searched to identify appropriate subject headings, then the headings are used to retrieve the matching bibliographic records. The prototype demonstrates the effectiveness and practicality of using an authority file as an index. Searching the authority file leverages authority control work by increasing the number of access points while supporting a simple interface designed for end-users.
  6. Bates, M.J.: Subject access in online catalogs: a design model (1986) 0.02 
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    Source
    Journal of the American Society for Information Science. 37(1986), S.357-367
  7. Piternick, A.B.: Vocabularies for online subject searching (1990) 0.02 
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    Source
    Encyclopedia of library and information science. Vol.45, [=Suppl.10]
  8. Zeng, L.: Achieving compatibility of indexing languages in online access environment (1992) 0.02 
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    Source
    Encyclopedia of library and information science. Vol.50, [=Suppl.13]
  9. Hjoerland, B.; Kyllesbech Nielsen, L.: Subject access points in electronic retrieval (2001) 0.02 
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    Source
    Annual review of information science and technology. 35(2001), S.249-298
  10. Gomez, L.; Lochbaum, C.C.; Landauer, T.K.: All the right words: finding what you want as an function of richness of indexing vocabulary (1990) 0.02 
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    Source
    Journal of the American Society for information Science. 41(1990) no.8, S.547-559
  11. Shiri, A.A.; Revie, C.; Chowdhury, G.: Thesaurus-enhanced search interfaces (2002) 0.02 
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    Source
    Journal of information science. 28(2002) no.2, S.111-122
  12. O'Neill, E.T.; Bennett, R.; Kammerer, K.: Using authorities to improve subject searches (2014) 0.02 
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    Abstract
    Authority files have played an important role in improving the quality of indexing and subject cataloging. Although authorities can significantly improve searching by increasing the number of access points, they are rarely an integral part of the information retrieval process, particularly end-users' searches. A retrieval prototype, searchFAST, was developed to test the feasibility of using an authority file as an index to bibliographic records. searchFAST uses Faceted Application of Subject Terminology (FAST) as an index to OCLC's WorldCat.org bibliographic database. The searchFAST prototype complements, rather than replaces, existing WorldCat.org access. The bibliographic file is searched indirectly; first the authority file is searched to identify appropriate subject headings, then the headings are used to retrieve the matching bibliographic records. The prototype demonstrates the effectiveness and practicality of using an authority file as an index. Searching the authority file leverages authority control work by increasing the number of access points while supporting a simple interface designed for end-users.
  13. Congreve, J.: Problems of subject access : automatic generation of printed indexes and online thesaural control (1986) 0.01 
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    Abstract
    A research project in progress at Middlesex Polytechnic is examining the problems of providing adequate subject access from MARC-based cataloguing systems. Various forms of printed index are being evaluated and an experimental OPAC is being designed. The PRECIS RIN file will be tested as a basis for online thesaural control and as a browsing facility
  14. Devadason, F.J.; Kumbhar, M.R.: Language and indexing language : Nalimor and Gardin revised (1988) 0.01 
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    Source
    Annals of library science and documentation. 35(1988) no.2, S.58-68
  15. Broughton, V.: Structural, linguistic and mathematical elements in indexing languages and search engines : implications for the use of index languages in electronic and non-LIS environments (2000) 0.01 
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    Abstract
    The paper looks at ways in which traditional classification and indexing tools have dealt with the relationships between constituent terms; variations in these are examined and compared with the methods used in machine searching, particularly of the Internet and World Wide Web. Apparent correspondences with features of index languages are identified, and further methods of applying classification and indexing theory to machine retrieval are proposed. There are various ways in which indexing and retrieval systems, both conventional and electronic, deal with the problem of searching for documents on a subject basis, and various approaches to the analysis and processing of a query. There appear to be three basic models; the taxonomic or structural system, in which the user is offered a map of the `universe of knowledge'; the language based system, which offers a vocabulary of the subject and a grammar for dealing with compound statements; and the mathematical model using the language of symbolic logic or the algebra of set theory
  16. DeHart, F.E.; Glazier, J.: Computer searching on PRECIS : an exploration of measuring comparative retrieval effectiveness (1984) 0.01 
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    Theme
    Preserved Context Index System (PRECIS)
  17. Schabas, A.H.: Postcoordinate retrieval : a comparison of two retrieval languages (1982) 0.01 
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    Abstract
    This article reports on a comparison of the postcoordinate retrieval effectiveness of two indexing languages: LCSH and PRECIS. The effect of augmenting each with title words was also studies. The database for the study was over 15.000 UK MARC records. Users returned 5.326 relevant judgements for citations retrieved for 61 SDI profiles, representing a wide variety of subjects. Results are reported in terms of precision and relative recall. Pure/applied sciences data and social science data were analyzed separately. Cochran's significance tests for ratios were used to interpret the findings. Recall emerged as the more important measure discriminating the behavior of the two languages. Addition of title words was found to improve recall of both indexing languages significantly. A direct relationship was observed between recall and exhaustivity. For the social sciences searches, recalls from PRECIS alone and from PRECIS with title words were significantly higher than those from LCSH alone and from LCSH with title words, respectively. Corresponding comparisons for the pure/applied sciences searches revealed no significant differences
    Source
    Journal of the American Society for Information Science. 33(1982), S.32-37
  18. Tirilly, P.; Julien, C.-A.: Random walks for subject hierarchy simplification (2012) 0.01 
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    Abstract
    Although subject hierarchies are widely used to index document collections, few tools leverage their structure to facilitate collection browsing. This is mostly due to the complexity of such structures that include thousands of nodes. This paper proposes a new approach to simplify subject hierarchies based on the distribution of documents among the nodes. A random walk algorithm simulates the route of a user within the hierarchy, under the assumption that the user is attracted by the most populated nodes. Poorly visited nodes can be identified and eliminated, leaving a structure containing only the nodes that best represent the content of the collection. Experiments on a collection indexed using the Library of Congress Subject Headings (LCSH) show that, as compared to the state-of-the-art simplification method, the random walk-based approach gives access to a larger part of the collection for the same structure size, and offers more flexibility to customize the complexity of thestructure.
  19. Svenonius, E.: Design of controlled vocabularies in the context of emerging technologies (1988) 0.01 
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    Source
    Library science with a slant to documentation and information studies. 25(1988), S.215-227
  20. Lambert, N.: Of thesauri and computers : reflections on the need for thesauri (1995) 0.01 
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    Source
    Searcher. 3(1995) no.8, S.18-22

Authors

Years

Languages

  • e 32
  • d 3

Types

  • a 34
  • el 1
  • m 1
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Themes

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