Search (4 results, page 1 of 1)

0.023291955 = product of:
  0.04658391 = sum of:
    0.04658391 = product of:
      0.09316782 = sum of:
        0.09316782 = weight(_text_:light in 1520) [ClassicSimilarity], result of:
          0.09316782 = score(doc=1520,freq=2.0), product of:
            0.2920221 = queryWeight, product of:
              5.7753086 = idf(docFreq=372, maxDocs=44218)
              0.050563898 = queryNorm
            0.31904373 = fieldWeight in 1520, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              5.7753086 = idf(docFreq=372, maxDocs=44218)
              0.0390625 = fieldNorm(doc=1520)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

This paper discusses issues concerning the augmentation of thesaurus relationships, in light of new application possibilities for retrieval. We first discuss a case study that explored the retrieval potential of an augmented set of thesaurus relationships by specialising standard relationships into richer subtypes, in particular hierarchical geographical containment and the associative relationship. We then locate this work in a broader context by reviewing various attempts to build taxonomies of thesaurus relationships, and conclude by discussing the feasibility of hierarchically augmenting the core set of thesaurus relationships, particularly the associative relationship. We discuss the possibility of enriching the specification and semantics of Related Term (RT relationships), while maintaining compatibility with traditional thesauri via a limited hierarchical extension of the associative (and hierarchical) relationships. This would be facilitated by distinguishing the type of term from the (sub)type of relationship and explicitly specifying semantic categories for terms following a faceted approach. We first illustrate how hierarchical spatial relationships can be used to provide more flexible retrieval for queries incorporating place names in applications employing online gazetteers and geographical thesauri. We then employ a set of experimental scenarios to investigate key issues affecting use of the associative (RT) thesaurus relationships in semantic distance measures. Previous work has noted the potential of RTs in thesaurus search aids but also the problem of uncontrolled expansion of query term sets. Results presented in this paper suggest the potential for taking account of the hierarchical context of an RT link and specialisations of the RT relationship

0.011988743 = product of:
  0.023977486 = sum of:
    0.023977486 = product of:
      0.047954973 = sum of:
        0.047954973 = weight(_text_:22 in 1149) [ClassicSimilarity], result of:
          0.047954973 = score(doc=1149,freq=2.0), product of:
            0.17706616 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.050563898 = queryNorm
            0.2708308 = fieldWeight in 1149, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=1149)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Date

22. 9.2007 15:45:57

0.011988743 = product of:
  0.023977486 = sum of:
    0.023977486 = product of:
      0.047954973 = sum of:
        0.047954973 = weight(_text_:22 in 4792) [ClassicSimilarity], result of:
          0.047954973 = score(doc=4792,freq=2.0), product of:
            0.17706616 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.050563898 = queryNorm
            0.2708308 = fieldWeight in 4792, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.0546875 = fieldNorm(doc=4792)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Source

Wissensspeicher in digitalen Räumen: Nachhaltigkeit - Verfügbarkeit - semantische Interoperabilität. Proceedings der 11. Tagung der Deutschen Sektion der Internationalen Gesellschaft für Wissensorganisation, Konstanz, 20. bis 22. Februar 2008. Hrsg.: J. Sieglerschmidt u. H.P.Ohly

0.0059943716 = product of:
  0.011988743 = sum of:
    0.011988743 = product of:
      0.023977486 = sum of:
        0.023977486 = weight(_text_:22 in 3644) [ClassicSimilarity], result of:
          0.023977486 = score(doc=3644,freq=2.0), product of:
            0.17706616 = queryWeight, product of:
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.050563898 = queryNorm
            0.1354154 = fieldWeight in 3644, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.5018296 = idf(docFreq=3622, maxDocs=44218)
              0.02734375 = fieldNorm(doc=3644)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Footnote

Original in: Information retrieval today: papers presented at an Institute conducted by the Library School and the Center for Continuation Study, University of Minnesota, Sept. 19-22, 1962. Ed. by Wesley Simonton. Minneapolis, Minn.: The Center, 1963. S.21-36.