Document (#7701)

Author
Sridhar, M.S.
Title
¬A mathematical approach to relations in thesauri
Source
Journal of library and information science. 5(1980), S.76-87
Year
1980
Abstract
Presents a brief background of set theory and relations including equivalence and ordering relations. Proposes four working hypotheses concerned with thesauri relations (USE, UF, NT, BT, GS & RT) and examines these relations against the characteristics of relations defined in mathematics. Explores the possibility of generating equivalence class of descritors from a single descriptor to aid information/document retrieval. provides a new mathematical approach to thesaurus and its relations and compares it against traditional way of representing thesaurus. Proposes new areas for investigation in this direction
Footnote
Vgl. auch die Beiträge (mit tw. abweichender Argumentation) von G. Beling: Towards a set theoretical foundation of classification und W. Gödert: Zum Problem der Äquivalenzrelation in Dokumentationssprachen und Schönfeldt

Similar documents (content)

  1. Riesthuis, G.J.A.: Multilingual subject access and the Guidelines for the establishment and development of multilingual thesauri : an experimental study (2000) 0.20
    0.1981763 = sum of:
      0.1981763 = product of:
        0.99088144 = sum of:
          0.11230121 = weight(abstract_txt:descriptor in 131) [ClassicSimilarity], result of:
            0.11230121 = score(doc=131,freq=1.0), product of:
              0.18464746 = queryWeight, product of:
                1.4896162 = boost
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.015922744 = queryNorm
              0.60819256 = fieldWeight in 131, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.078125 = fieldNorm(doc=131)
          0.113680884 = weight(abstract_txt:thesaurus in 131) [ClassicSimilarity], result of:
            0.113680884 = score(doc=131,freq=3.0), product of:
              0.16262285 = queryWeight, product of:
                1.9770083 = boost
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.015922744 = queryNorm
              0.6990462 = fieldWeight in 131, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.078125 = fieldNorm(doc=131)
          0.07628536 = weight(abstract_txt:thesauri in 131) [ClassicSimilarity], result of:
            0.07628536 = score(doc=131,freq=1.0), product of:
              0.17977303 = queryWeight, product of:
                2.0786433 = boost
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.015922744 = queryNorm
              0.42434263 = fieldWeight in 131, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.078125 = fieldNorm(doc=131)
          0.28659117 = weight(abstract_txt:equivalence in 131) [ClassicSimilarity], result of:
            0.28659117 = score(doc=131,freq=2.0), product of:
              0.34482253 = queryWeight, product of:
                2.8788266 = boost
                7.5225 = idf(docFreq=64, maxDocs=44218)
                0.015922744 = queryNorm
              0.83112663 = fieldWeight in 131, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                7.5225 = idf(docFreq=64, maxDocs=44218)
                0.078125 = fieldNorm(doc=131)
          0.40202287 = weight(abstract_txt:relations in 131) [ClassicSimilarity], result of:
            0.40202287 = score(doc=131,freq=2.0), product of:
              0.65606004 = queryWeight, product of:
                7.428883 = boost
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.015922744 = queryNorm
              0.6127837 = fieldWeight in 131, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.078125 = fieldNorm(doc=131)
        0.2 = coord(5/25)
    
  2. Merilainen, O.: Asiasanaekvivalenssi ja tesaurusten yhteensopivuus (1996) 0.19
    0.18763542 = sum of:
      0.18763542 = product of:
        1.1727214 = sum of:
          0.23341368 = weight(abstract_txt:descriptor in 988) [ClassicSimilarity], result of:
            0.23341368 = score(doc=988,freq=3.0), product of:
              0.18464746 = queryWeight, product of:
                1.4896162 = boost
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.015922744 = queryNorm
              1.2641045 = fieldWeight in 988, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                7.7848644 = idf(docFreq=49, maxDocs=44218)
                0.09375 = fieldNorm(doc=988)
          0.07876042 = weight(abstract_txt:thesaurus in 988) [ClassicSimilarity], result of:
            0.07876042 = score(doc=988,freq=1.0), product of:
              0.16262285 = queryWeight, product of:
                1.9770083 = boost
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.015922744 = queryNorm
              0.48431337 = fieldWeight in 988, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.09375 = fieldNorm(doc=988)
          0.09154244 = weight(abstract_txt:thesauri in 988) [ClassicSimilarity], result of:
            0.09154244 = score(doc=988,freq=1.0), product of:
              0.17977303 = queryWeight, product of:
                2.0786433 = boost
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.015922744 = queryNorm
              0.5092112 = fieldWeight in 988, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.09375 = fieldNorm(doc=988)
          0.7690049 = weight(abstract_txt:equivalence in 988) [ClassicSimilarity], result of:
            0.7690049 = score(doc=988,freq=10.0), product of:
              0.34482253 = queryWeight, product of:
                2.8788266 = boost
                7.5225 = idf(docFreq=64, maxDocs=44218)
                0.015922744 = queryNorm
              2.230147 = fieldWeight in 988, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                7.5225 = idf(docFreq=64, maxDocs=44218)
                0.09375 = fieldNorm(doc=988)
        0.16 = coord(4/25)
    
  3. Ejei, F.; Beheshti, M.S.H.; Rajabi, T.; Ejehi, Z.: Enriching semantic relations of basic sciences ontology (2017) 0.18
    0.17880718 = sum of:
      0.17880718 = product of:
        0.89403594 = sum of:
          0.03859116 = weight(abstract_txt:representing in 3844) [ClassicSimilarity], result of:
            0.03859116 = score(doc=3844,freq=1.0), product of:
              0.10512007 = queryWeight, product of:
                1.1239462 = boost
                5.8738413 = idf(docFreq=337, maxDocs=44218)
                0.015922744 = queryNorm
              0.36711508 = fieldWeight in 3844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8738413 = idf(docFreq=337, maxDocs=44218)
                0.0625 = fieldNorm(doc=3844)
          0.059654057 = weight(abstract_txt:generating in 3844) [ClassicSimilarity], result of:
            0.059654057 = score(doc=3844,freq=1.0), product of:
              0.14053583 = queryWeight, product of:
                1.2995597 = boost
                6.7916126 = idf(docFreq=134, maxDocs=44218)
                0.015922744 = queryNorm
              0.4244758 = fieldWeight in 3844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.7916126 = idf(docFreq=134, maxDocs=44218)
                0.0625 = fieldNorm(doc=3844)
          0.05250695 = weight(abstract_txt:thesaurus in 3844) [ClassicSimilarity], result of:
            0.05250695 = score(doc=3844,freq=1.0), product of:
              0.16262285 = queryWeight, product of:
                1.9770083 = boost
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.015922744 = queryNorm
              0.3228756 = fieldWeight in 3844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.0625 = fieldNorm(doc=3844)
          0.06102829 = weight(abstract_txt:thesauri in 3844) [ClassicSimilarity], result of:
            0.06102829 = score(doc=3844,freq=1.0), product of:
              0.17977303 = queryWeight, product of:
                2.0786433 = boost
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.015922744 = queryNorm
              0.3394741 = fieldWeight in 3844, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.0625 = fieldNorm(doc=3844)
          0.6822555 = weight(abstract_txt:relations in 3844) [ClassicSimilarity], result of:
            0.6822555 = score(doc=3844,freq=9.0), product of:
              0.65606004 = queryWeight, product of:
                7.428883 = boost
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.015922744 = queryNorm
              1.0399284 = fieldWeight in 3844, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.0625 = fieldNorm(doc=3844)
        0.2 = coord(5/25)
    
  4. Ibekwe-SanJuan, F.: Constructing and maintaining knowledge organization tools : a symbolic approach (2006) 0.16
    0.16283011 = sum of:
      0.16283011 = product of:
        0.8141506 = sum of:
          0.024759613 = weight(abstract_txt:approach in 5595) [ClassicSimilarity], result of:
            0.024759613 = score(doc=5595,freq=2.0), product of:
              0.08547733 = queryWeight, product of:
                1.43332 = boost
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.015922744 = queryNorm
              0.28966293 = fieldWeight in 5595, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.745328 = idf(docFreq=2839, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5595)
          0.10273297 = weight(abstract_txt:thesaurus in 5595) [ClassicSimilarity], result of:
            0.10273297 = score(doc=5595,freq=5.0), product of:
              0.16262285 = queryWeight, product of:
                1.9770083 = boost
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.015922744 = queryNorm
              0.6317253 = fieldWeight in 5595, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5595)
          0.07042628 = weight(abstract_txt:proposes in 5595) [ClassicSimilarity], result of:
            0.07042628 = score(doc=5595,freq=2.0), product of:
              0.17159772 = queryWeight, product of:
                2.0308294 = boost
                5.3066463 = idf(docFreq=595, maxDocs=44218)
                0.015922744 = queryNorm
              0.410415 = fieldWeight in 5595, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.3066463 = idf(docFreq=595, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5595)
          0.053399753 = weight(abstract_txt:thesauri in 5595) [ClassicSimilarity], result of:
            0.053399753 = score(doc=5595,freq=1.0), product of:
              0.17977303 = queryWeight, product of:
                2.0786433 = boost
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.015922744 = queryNorm
              0.29703984 = fieldWeight in 5595, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5595)
          0.562832 = weight(abstract_txt:relations in 5595) [ClassicSimilarity], result of:
            0.562832 = score(doc=5595,freq=8.0), product of:
              0.65606004 = queryWeight, product of:
                7.428883 = boost
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.015922744 = queryNorm
              0.8578971 = fieldWeight in 5595, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.0546875 = fieldNorm(doc=5595)
        0.2 = coord(5/25)
    
  5. Mazzocchi, F.; Tiberi, M.; De Santis, B.; Plini, P.: Relational semantics in thesauri : an overview and some remarks at theoretical and practical levels (2007) 0.15
    0.14538424 = sum of:
      0.14538424 = product of:
        0.60576767 = sum of:
          0.03859116 = weight(abstract_txt:representing in 1462) [ClassicSimilarity], result of:
            0.03859116 = score(doc=1462,freq=1.0), product of:
              0.10512007 = queryWeight, product of:
                1.1239462 = boost
                5.8738413 = idf(docFreq=337, maxDocs=44218)
                0.015922744 = queryNorm
              0.36711508 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8738413 = idf(docFreq=337, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
          0.067735784 = weight(abstract_txt:possibility in 1462) [ClassicSimilarity], result of:
            0.067735784 = score(doc=1462,freq=2.0), product of:
              0.12140293 = queryWeight, product of:
                1.2078619 = boost
                6.312392 = idf(docFreq=217, maxDocs=44218)
                0.015922744 = queryNorm
              0.5579419 = fieldWeight in 1462, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                6.312392 = idf(docFreq=217, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
          0.09094471 = weight(abstract_txt:thesaurus in 1462) [ClassicSimilarity], result of:
            0.09094471 = score(doc=1462,freq=3.0), product of:
              0.16262285 = queryWeight, product of:
                1.9770083 = boost
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.015922744 = queryNorm
              0.55923694 = fieldWeight in 1462, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.1660094 = idf(docFreq=685, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
          0.1057041 = weight(abstract_txt:thesauri in 1462) [ClassicSimilarity], result of:
            0.1057041 = score(doc=1462,freq=3.0), product of:
              0.17977303 = queryWeight, product of:
                2.0786433 = boost
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.015922744 = queryNorm
              0.5879864 = fieldWeight in 1462, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.431586 = idf(docFreq=525, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
          0.07537343 = weight(abstract_txt:against in 1462) [ClassicSimilarity], result of:
            0.07537343 = score(doc=1462,freq=1.0), product of:
              0.20694229 = queryWeight, product of:
                2.2301924 = boost
                5.8275905 = idf(docFreq=353, maxDocs=44218)
                0.015922744 = queryNorm
              0.3642244 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.8275905 = idf(docFreq=353, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
          0.22741848 = weight(abstract_txt:relations in 1462) [ClassicSimilarity], result of:
            0.22741848 = score(doc=1462,freq=1.0), product of:
              0.65606004 = queryWeight, product of:
                7.428883 = boost
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.015922744 = queryNorm
              0.3466428 = fieldWeight in 1462, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.5462847 = idf(docFreq=468, maxDocs=44218)
                0.0625 = fieldNorm(doc=1462)
        0.24 = coord(6/25)