Document (#31675)

Author

Rolland-Thomas, P.

Title

Thesaural codes : an appraisal of their use in the Library of Congress Subject Headings

Source

Cataloging and classification quarterly. 16(1993) no.2, S.71-91

Year

1993

Abstract

LCSH is known as such since 1975. It always has created headings to serve the LC collections instead of a theoretical basis. It started to replace cross reference codes by thesaural codes in 1986, in a mechanical fashion. It was in no way transformed into a thesaurus. Its encyclopedic coverage, its pre-coordinate concepts make it substantially distinct, considering that thesauri usually map a restricted field of knowledge and use uniterms. The questions raised are whether the new symbols comply with thesaurus standards and if they are true to one or to several models. Explanations and definitions from other lists of subject headings and thesauri, literature in the field of classification and subject indexing will provide some answers. For instance, see refers from a subject heading not used to another or others used. Exceptionally it will lead from a specific term to a more general one. Some equate a see reference with the equivalence relationship. Such relationships are pointed by USE in LCSH. See also references are made from the broader subject to narrower parts of it and also between associated subjects. They suggest lateral or vertical connexions as well as reciprocal relationships. They serve a coordination purpose for some, lay down a methodical search itinerary for others. Since their inception in the 1950's thesauri have been devised for indexing and retrieving information in the fields of science and technology. Eventually they attended to a number of social sciences and humanities. Research derived from thesauri was voluminous. Numerous guidelines are designed. They did not discriminate between the "hard" sciences and the social sciences. RT relationships are widely but diversely used in numerous controlled vocabularies. LCSH's aim is to achieve a list almost free of RT and SA references. It thus restricts relationships to BT/NT, USE and UF. This raises the question as to whether all fields of knowledge can "fit" in the Procrustean bed of RT/NT, i.e., genus/species relationships. Standard codes were devised. It was soon realized that BT/NT, well suited to the genus/species couple could not signal a whole-part relationship. In LCSH, BT and NT function as reciprocals, the whole-part relationship is taken into account by ISO. It is amply elaborated upon by authors. The part-whole connexion is sometimes studied apart. The decision to replace cross reference codes was an improvement. Relations can now be distinguished through the distinct needs of numerous fields of knowledge are not attended to. Topic inclusion, and topic-subtopic, could provide the missing link where genus/species or whole/part are inadequate. Distinct codes, BT/NT and whole/part, should be provided. Sorting relationships with mechanical means can only lead to confusion.

Theme

Konzeption und Anwendung des Prinzips Thesaurus
Wissensrepräsentation

Object

LCSH

Similar documents (author)

1. Rolland-Thomas, P.: ¬The role of classification in subject retrieval in the future (1976) 5.63

   5.631217 = sum of:
     5.631217 = sum of:
       2.2755442 = weight(author_txt:thomas in 1845) [ClassicSimilarity], result of:
         2.2755442 = score(doc=1845,freq=1.0), product of:
           0.6110162 = queryWeight, product of:
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.08203331 = queryNorm
           3.724196 = fieldWeight in 1845, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.5 = fieldNorm(doc=1845)
       3.355673 = weight(author_txt:rolland in 1845) [ClassicSimilarity], result of:
         3.355673 = score(doc=1845,freq=1.0), product of:
           0.791618 = queryWeight, product of:
             1.1382338 = boost
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.08203331 = queryNorm
           4.2390056 = fieldWeight in 1845, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.5 = fieldNorm(doc=1845)
   

2. Rolland-Thomas, P.: Dewey Decimal Classification edition 20 : a critical review (1991) 5.63

   5.631217 = sum of:
     5.631217 = sum of:
       2.2755442 = weight(author_txt:thomas in 2526) [ClassicSimilarity], result of:
         2.2755442 = score(doc=2526,freq=1.0), product of:
           0.6110162 = queryWeight, product of:
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.08203331 = queryNorm
           3.724196 = fieldWeight in 2526, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.5 = fieldNorm(doc=2526)
       3.355673 = weight(author_txt:rolland in 2526) [ClassicSimilarity], result of:
         3.355673 = score(doc=2526,freq=1.0), product of:
           0.791618 = queryWeight, product of:
             1.1382338 = boost
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.08203331 = queryNorm
           4.2390056 = fieldWeight in 2526, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.5 = fieldNorm(doc=2526)
   

3. Rolland-Thomas, P.: Étude préliminaire à l'elaboration d'un vocabulaire contrôle en langue française pour le catalogue matière des bibliothèques publiques et scolaires (1993) 5.63

   5.631217 = sum of:
     5.631217 = sum of:
       2.2755442 = weight(author_txt:thomas in 7328) [ClassicSimilarity], result of:
         2.2755442 = score(doc=7328,freq=1.0), product of:
           0.6110162 = queryWeight, product of:
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.08203331 = queryNorm
           3.724196 = fieldWeight in 7328, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.5 = fieldNorm(doc=7328)
       3.355673 = weight(author_txt:rolland in 7328) [ClassicSimilarity], result of:
         3.355673 = score(doc=7328,freq=1.0), product of:
           0.791618 = queryWeight, product of:
             1.1382338 = boost
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.08203331 = queryNorm
           4.2390056 = fieldWeight in 7328, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.5 = fieldNorm(doc=7328)
   

4. Rolland-Thomas, P.: Eassai sur la contribution de l'anthropologie culturelle aux fondements de la classification documentaire (1996) 5.63

   5.631217 = sum of:
     5.631217 = sum of:
       2.2755442 = weight(author_txt:thomas in 5777) [ClassicSimilarity], result of:
         2.2755442 = score(doc=5777,freq=1.0), product of:
           0.6110162 = queryWeight, product of:
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.08203331 = queryNorm
           3.724196 = fieldWeight in 5777, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.5 = fieldNorm(doc=5777)
       3.355673 = weight(author_txt:rolland in 5777) [ClassicSimilarity], result of:
         3.355673 = score(doc=5777,freq=1.0), product of:
           0.791618 = queryWeight, product of:
             1.1382338 = boost
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.08203331 = queryNorm
           4.2390056 = fieldWeight in 5777, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.5 = fieldNorm(doc=5777)
   

5. Rolland-Thomas, P.: Towards the establishment of the validity of encyclopedic library classification systems (1982) 5.63

   5.631217 = sum of:
     5.631217 = sum of:
       2.2755442 = weight(author_txt:thomas in 18) [ClassicSimilarity], result of:
         2.2755442 = score(doc=18,freq=1.0), product of:
           0.6110162 = queryWeight, product of:
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.08203331 = queryNorm
           3.724196 = fieldWeight in 18, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             7.448392 = idf(docFreq=69, maxDocs=44218)
             0.5 = fieldNorm(doc=18)
       3.355673 = weight(author_txt:rolland in 18) [ClassicSimilarity], result of:
         3.355673 = score(doc=18,freq=1.0), product of:
           0.791618 = queryWeight, product of:
             1.1382338 = boost
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.08203331 = queryNorm
           4.2390056 = fieldWeight in 18, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.478011 = idf(docFreq=24, maxDocs=44218)
             0.5 = fieldNorm(doc=18)
   

Similar documents (content)

1. Spero, S.: LCSH is to thesaurus as doorbell is to mammal : visualizing structural problems in the Library of Congress Subject Headings (2008) 0.19

   0.18861131 = sum of:
     0.18861131 = product of:
       0.47152826 = sum of:
         0.027387893 = weight(abstract_txt:reference in 2659) [ClassicSimilarity], result of:
           0.027387893 = score(doc=2659,freq=2.0), product of:
             0.09257713 = queryWeight, product of:
               1.1563814 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.017939238 = queryNorm
             0.29583865 = fieldWeight in 2659, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.010843518 = weight(abstract_txt:from in 2659) [ClassicSimilarity], result of:
           0.010843518 = score(doc=2659,freq=2.0), product of:
             0.05918264 = queryWeight, product of:
               1.1936328 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017939238 = queryNorm
             0.18322127 = fieldWeight in 2659, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.026511094 = weight(abstract_txt:relationship in 2659) [ClassicSimilarity], result of:
           0.026511094 = score(doc=2659,freq=1.0), product of:
             0.11413698 = queryWeight, product of:
               1.2839922 = boost
               4.9551864 = idf(docFreq=846, maxDocs=44218)
               0.017939238 = queryNorm
             0.23227435 = fieldWeight in 2659, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9551864 = idf(docFreq=846, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.06661058 = weight(abstract_txt:headings in 2659) [ClassicSimilarity], result of:
           0.06661058 = score(doc=2659,freq=5.0), product of:
             0.12336163 = queryWeight, product of:
               1.3348709 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.017939238 = queryNorm
             0.53996193 = fieldWeight in 2659, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.087296546 = weight(abstract_txt:thesaural in 2659) [ClassicSimilarity], result of:
           0.087296546 = score(doc=2659,freq=1.0), product of:
             0.22068639 = queryWeight, product of:
               1.4577779 = boost
               8.43879 = idf(docFreq=25, maxDocs=44218)
               0.017939238 = queryNorm
             0.3955683 = fieldWeight in 2659, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.43879 = idf(docFreq=25, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.019182226 = weight(abstract_txt:they in 2659) [ClassicSimilarity], result of:
           0.019182226 = score(doc=2659,freq=1.0), product of:
             0.1090662 = queryWeight, product of:
               1.6203867 = boost
               3.7520406 = idf(docFreq=2820, maxDocs=44218)
               0.017939238 = queryNorm
             0.1758769 = fieldWeight in 2659, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.7520406 = idf(docFreq=2820, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.10866791 = weight(abstract_txt:lcsh in 2659) [ClassicSimilarity], result of:
           0.10866791 = score(doc=2659,freq=4.0), product of:
             0.18415725 = queryWeight, product of:
               1.6309612 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.017939238 = queryNorm
             0.59008217 = fieldWeight in 2659, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.021658726 = weight(abstract_txt:subject in 2659) [ClassicSimilarity], result of:
           0.021658726 = score(doc=2659,freq=1.0), product of:
             0.118262246 = queryWeight, product of:
               1.6873169 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.017939238 = queryNorm
             0.1831415 = fieldWeight in 2659, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.034900617 = weight(abstract_txt:part in 2659) [ClassicSimilarity], result of:
           0.034900617 = score(doc=2659,freq=1.0), product of:
             0.16254725 = queryWeight, product of:
               1.9781691 = boost
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.017939238 = queryNorm
             0.21471061 = fieldWeight in 2659, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
         0.0684692 = weight(abstract_txt:relationships in 2659) [ClassicSimilarity], result of:
           0.0684692 = score(doc=2659,freq=2.0), product of:
             0.21485135 = queryWeight, product of:
               2.4913414 = boost
               4.807296 = idf(docFreq=981, maxDocs=44218)
               0.017939238 = queryNorm
             0.31868172 = fieldWeight in 2659, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.807296 = idf(docFreq=981, maxDocs=44218)
               0.046875 = fieldNorm(doc=2659)
       0.4 = coord(10/25)
   

2. BIOSIS introduces new relational indexing scheme and additional information in 1998 (1998) 0.16

   0.1637147 = sum of:
     0.1637147 = product of:
       1.023217 = sum of:
         0.14440882 = weight(abstract_txt:replace in 2595) [ClassicSimilarity], result of:
           0.14440882 = score(doc=2595,freq=1.0), product of:
             0.16051939 = queryWeight, product of:
               1.2432754 = boost
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.017939238 = queryNorm
             0.8996347 = fieldWeight in 2595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.1970778 = idf(docFreq=89, maxDocs=44218)
               0.125 = fieldNorm(doc=2595)
         0.0577566 = weight(abstract_txt:subject in 2595) [ClassicSimilarity], result of:
           0.0577566 = score(doc=2595,freq=1.0), product of:
             0.118262246 = queryWeight, product of:
               1.6873169 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.017939238 = queryNorm
             0.48837733 = fieldWeight in 2595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.125 = fieldNorm(doc=2595)
         0.30416456 = weight(abstract_txt:species in 2595) [ClassicSimilarity], result of:
           0.30416456 = score(doc=2595,freq=1.0), product of:
             0.30192646 = queryWeight, product of:
               2.0883334 = boost
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.017939238 = queryNorm
             1.0074127 = fieldWeight in 2595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.125 = fieldNorm(doc=2595)
         0.516887 = weight(abstract_txt:genus in 2595) [ClassicSimilarity], result of:
           0.516887 = score(doc=2595,freq=1.0), product of:
             0.42995784 = queryWeight, product of:
               2.492081 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.017939238 = queryNorm
             1.2021807 = fieldWeight in 2595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.125 = fieldNorm(doc=2595)
       0.16 = coord(4/25)
   

3. Devadason, F.J.: Online construction of alphabetic classaurus : a vocabulary control and indexing tool (1985) 0.16

   0.15864754 = sum of:
     0.15864754 = product of:
       0.56659836 = sum of:
         0.019366167 = weight(abstract_txt:reference in 1467) [ClassicSimilarity], result of:
           0.019366167 = score(doc=1467,freq=1.0), product of:
             0.09257713 = queryWeight, product of:
               1.1563814 = boost
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.017939238 = queryNorm
             0.20918953 = fieldWeight in 1467, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.46271 = idf(docFreq=1385, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.059578322 = weight(abstract_txt:headings in 1467) [ClassicSimilarity], result of:
           0.059578322 = score(doc=1467,freq=4.0), product of:
             0.12336163 = queryWeight, product of:
               1.3348709 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.017939238 = queryNorm
             0.48295665 = fieldWeight in 1467, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.048430383 = weight(abstract_txt:subject in 1467) [ClassicSimilarity], result of:
           0.048430383 = score(doc=1467,freq=5.0), product of:
             0.118262246 = queryWeight, product of:
               1.6873169 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.017939238 = queryNorm
             0.40951687 = fieldWeight in 1467, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.09871385 = weight(abstract_txt:part in 1467) [ClassicSimilarity], result of:
           0.09871385 = score(doc=1467,freq=8.0), product of:
             0.16254725 = queryWeight, product of:
               1.9781691 = boost
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.017939238 = queryNorm
             0.6072933 = fieldWeight in 1467, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.1613076 = weight(abstract_txt:species in 1467) [ClassicSimilarity], result of:
           0.1613076 = score(doc=1467,freq=2.0), product of:
             0.30192646 = queryWeight, product of:
               2.0883334 = boost
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.017939238 = queryNorm
             0.5342612 = fieldWeight in 1467, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.07473216 = weight(abstract_txt:whole in 1467) [ClassicSimilarity], result of:
           0.07473216 = score(doc=1467,freq=1.0), product of:
             0.2700407 = queryWeight, product of:
               2.5496948 = boost
               5.9038734 = idf(docFreq=327, maxDocs=44218)
               0.017939238 = queryNorm
             0.27674407 = fieldWeight in 1467, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9038734 = idf(docFreq=327, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
         0.104469866 = weight(abstract_txt:codes in 1467) [ClassicSimilarity], result of:
           0.104469866 = score(doc=1467,freq=1.0), product of:
             0.35876656 = queryWeight, product of:
               3.219365 = boost
               6.2120905 = idf(docFreq=240, maxDocs=44218)
               0.017939238 = queryNorm
             0.29119176 = fieldWeight in 1467, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.2120905 = idf(docFreq=240, maxDocs=44218)
               0.046875 = fieldNorm(doc=1467)
       0.28 = coord(7/25)
   

4. Satija, M.P.: Library classification : an essay in terminology (2000) 0.14

   0.13753915 = sum of:
     0.13753915 = product of:
       0.68769574 = sum of:
         0.044185158 = weight(abstract_txt:relationship in 6091) [ClassicSimilarity], result of:
           0.044185158 = score(doc=6091,freq=1.0), product of:
             0.11413698 = queryWeight, product of:
               1.2839922 = boost
               4.9551864 = idf(docFreq=846, maxDocs=44218)
               0.017939238 = queryNorm
             0.38712394 = fieldWeight in 6091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9551864 = idf(docFreq=846, maxDocs=44218)
               0.078125 = fieldNorm(doc=6091)
         0.094255485 = weight(abstract_txt:numerous in 6091) [ClassicSimilarity], result of:
           0.094255485 = score(doc=6091,freq=1.0), product of:
             0.18913847 = queryWeight, product of:
               1.6528717 = boost
               6.378767 = idf(docFreq=203, maxDocs=44218)
               0.017939238 = queryNorm
             0.49834117 = fieldWeight in 6091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.378767 = idf(docFreq=203, maxDocs=44218)
               0.078125 = fieldNorm(doc=6091)
         0.036097877 = weight(abstract_txt:subject in 6091) [ClassicSimilarity], result of:
           0.036097877 = score(doc=6091,freq=1.0), product of:
             0.118262246 = queryWeight, product of:
               1.6873169 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.017939238 = queryNorm
             0.30523583 = fieldWeight in 6091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=6091)
         0.19010285 = weight(abstract_txt:species in 6091) [ClassicSimilarity], result of:
           0.19010285 = score(doc=6091,freq=1.0), product of:
             0.30192646 = queryWeight, product of:
               2.0883334 = boost
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.017939238 = queryNorm
             0.62963295 = fieldWeight in 6091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.059301 = idf(docFreq=37, maxDocs=44218)
               0.078125 = fieldNorm(doc=6091)
         0.3230544 = weight(abstract_txt:genus in 6091) [ClassicSimilarity], result of:
           0.3230544 = score(doc=6091,freq=1.0), product of:
             0.42995784 = queryWeight, product of:
               2.492081 = boost
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.017939238 = queryNorm
             0.751363 = fieldWeight in 6091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.617446 = idf(docFreq=7, maxDocs=44218)
               0.078125 = fieldNorm(doc=6091)
       0.2 = coord(5/25)
   

5. Rada, R.: Connecting and evaluating thesauri : issues and cases (1987) 0.13

   0.13157208 = sum of:
     0.13157208 = product of:
       0.548217 = sum of:
         0.01533505 = weight(abstract_txt:from in 823) [ClassicSimilarity], result of:
           0.01533505 = score(doc=823,freq=1.0), product of:
             0.05918264 = queryWeight, product of:
               1.1936328 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017939238 = queryNorm
             0.259114 = fieldWeight in 823, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
         0.059578322 = weight(abstract_txt:headings in 823) [ClassicSimilarity], result of:
           0.059578322 = score(doc=823,freq=1.0), product of:
             0.12336163 = queryWeight, product of:
               1.3348709 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.017939238 = queryNorm
             0.48295665 = fieldWeight in 823, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
         0.043317452 = weight(abstract_txt:subject in 823) [ClassicSimilarity], result of:
           0.043317452 = score(doc=823,freq=1.0), product of:
             0.118262246 = queryWeight, product of:
               1.6873169 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.017939238 = queryNorm
             0.366283 = fieldWeight in 823, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
         0.26335487 = weight(abstract_txt:thesauri in 823) [ClassicSimilarity], result of:
           0.26335487 = score(doc=823,freq=8.0), product of:
             0.18285146 = queryWeight, product of:
               1.8765831 = boost
               5.431586 = idf(docFreq=525, maxDocs=44218)
               0.017939238 = queryNorm
             1.4402666 = fieldWeight in 823, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               5.431586 = idf(docFreq=525, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
         0.06980123 = weight(abstract_txt:part in 823) [ClassicSimilarity], result of:
           0.06980123 = score(doc=823,freq=1.0), product of:
             0.16254725 = queryWeight, product of:
               1.9781691 = boost
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.017939238 = queryNorm
             0.42942122 = fieldWeight in 823, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.580493 = idf(docFreq=1231, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
         0.09683006 = weight(abstract_txt:relationships in 823) [ClassicSimilarity], result of:
           0.09683006 = score(doc=823,freq=1.0), product of:
             0.21485135 = queryWeight, product of:
               2.4913414 = boost
               4.807296 = idf(docFreq=981, maxDocs=44218)
               0.017939238 = queryNorm
             0.45068398 = fieldWeight in 823, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.807296 = idf(docFreq=981, maxDocs=44218)
               0.09375 = fieldNorm(doc=823)
       0.24 = coord(6/25)