Document (#1147)

Author
Chan, L.M.
Title
Library of Congress class numbers in online catalog searching
Source
RQ. 28(1989), S.530-536
Year
1989
Abstract
In addition to using title keywords and subject headings for searching in the online catalog, the searcher may also use class numbers as access points. Library of Congress class or call numbers are particular effective in certain kinds of specific-item subject searching and serve as supplements to keywords and descriptors, improving precision and recall. Class number searching in the database can produce unique results because these numbers collect citations in ways that differ from those of keywords and descriptors
Theme
Klassifikationssysteme im Online-Retrieval
Object
LCC

Similar documents (author)

  1. Chan, L.M.: Year's work in cataloging and classification : 1975 (1976) 4.55
    4.54692 = sum of:
      4.54692 = weight(author_txt:chan in 307) [ClassicSimilarity], result of:
        4.54692 = fieldWeight in 307, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.275072 = idf(docFreq=78, maxDocs=41962)
          0.625 = fieldNorm(doc=307)
    
  2. Chan, L.M.: 'American poetry' but 'Satire, American' : the direct and inverted forms of subject headings containing national adjectives (1973) 4.55
    4.54692 = sum of:
      4.54692 = weight(author_txt:chan in 382) [ClassicSimilarity], result of:
        4.54692 = fieldWeight in 382, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.275072 = idf(docFreq=78, maxDocs=41962)
          0.625 = fieldNorm(doc=382)
    
  3. Chan, L.M.: Library of Congress Classification as an online retrieval tool : potentials and limitations (1986) 4.55
    4.54692 = sum of:
      4.54692 = weight(author_txt:chan in 1145) [ClassicSimilarity], result of:
        4.54692 = fieldWeight in 1145, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.275072 = idf(docFreq=78, maxDocs=41962)
          0.625 = fieldNorm(doc=1145)
    
  4. Chan, L.M.: Dewey 18: another step in an evolutionary step (1972) 4.55
    4.54692 = sum of:
      4.54692 = weight(author_txt:chan in 1780) [ClassicSimilarity], result of:
        4.54692 = fieldWeight in 1780, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.275072 = idf(docFreq=78, maxDocs=41962)
          0.625 = fieldNorm(doc=1780)
    
  5. Chan, L.M.: Subject analysis tools online : the challenge ahead (1990) 4.55
    4.54692 = sum of:
      4.54692 = weight(author_txt:chan in 2165) [ClassicSimilarity], result of:
        4.54692 = fieldWeight in 2165, product of:
          1.0 = tf(freq=1.0), with freq of:
            1.0 = termFreq=1.0
          7.275072 = idf(docFreq=78, maxDocs=41962)
          0.625 = fieldNorm(doc=2165)
    

Similar documents (content)

  1. Subrahmanyam, B.: Library of Congress Classification numbers : issues of consistency and their implications for union catalogs (2006) 0.30
    0.3005041 = sum of:
      0.3005041 = product of:
        1.0732288 = sum of:
          0.03436259 = weight(abstract_txt:certain in 785) [ClassicSimilarity], result of:
            0.03436259 = score(doc=785,freq=1.0), product of:
              0.09864065 = queryWeight, product of:
                1.0109714 = boost
                5.573782 = idf(docFreq=432, maxDocs=41962)
                0.017505199 = queryNorm
              0.34836137 = fieldWeight in 785, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.573782 = idf(docFreq=432, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.06371098 = weight(abstract_txt:title in 785) [ClassicSimilarity], result of:
            0.06371098 = score(doc=785,freq=3.0), product of:
              0.103220925 = queryWeight, product of:
                1.0341768 = boost
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.017505199 = queryNorm
              0.6172293 = fieldWeight in 785, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.031635884 = weight(abstract_txt:library in 785) [ClassicSimilarity], result of:
            0.031635884 = score(doc=785,freq=6.0), product of:
              0.06472591 = queryWeight, product of:
                1.1581506 = boost
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.017505199 = queryNorm
              0.4887669 = fieldWeight in 785, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.023755634 = weight(abstract_txt:subject in 785) [ClassicSimilarity], result of:
            0.023755634 = score(doc=785,freq=1.0), product of:
              0.09716721 = queryWeight, product of:
                1.4190111 = boost
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.017505199 = queryNorm
              0.24448201 = fieldWeight in 785, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.06339953 = weight(abstract_txt:congress in 785) [ClassicSimilarity], result of:
            0.06339953 = score(doc=785,freq=1.0), product of:
              0.1869531 = queryWeight, product of:
                1.9683044 = boost
                5.4259195 = idf(docFreq=501, maxDocs=41962)
                0.017505199 = queryNorm
              0.33911997 = fieldWeight in 785, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.4259195 = idf(docFreq=501, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.39263633 = weight(abstract_txt:numbers in 785) [ClassicSimilarity], result of:
            0.39263633 = score(doc=785,freq=6.0), product of:
              0.43714803 = queryWeight, product of:
                4.256525 = boost
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.017505199 = queryNorm
              0.898177 = fieldWeight in 785, product of:
                2.4494898 = tf(freq=6.0), with freq of:
                  6.0 = termFreq=6.0
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
          0.46372783 = weight(abstract_txt:class in 785) [ClassicSimilarity], result of:
            0.46372783 = score(doc=785,freq=8.0), product of:
              0.44377628 = queryWeight, product of:
                4.2886734 = boost
                5.9111786 = idf(docFreq=308, maxDocs=41962)
                0.017505199 = queryNorm
              1.0449586 = fieldWeight in 785, product of:
                2.828427 = tf(freq=8.0), with freq of:
                  8.0 = termFreq=8.0
                5.9111786 = idf(docFreq=308, maxDocs=41962)
                0.0625 = fieldNorm(doc=785)
        0.28 = coord(7/25)
    
  2. McJunkin, M.C.: Precision and recall in title keyword searching (1995) 0.27
    0.27296945 = sum of:
      0.27296945 = product of:
        0.8530296 = sum of:
          0.072001226 = weight(abstract_txt:precision in 3420) [ClassicSimilarity], result of:
            0.072001226 = score(doc=3420,freq=3.0), product of:
              0.0965113 = queryWeight, product of:
                5.5132933 = idf(docFreq=459, maxDocs=41962)
                0.017505199 = queryNorm
              0.7460394 = fieldWeight in 3420, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.5132933 = idf(docFreq=459, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.10281316 = weight(abstract_txt:title in 3420) [ClassicSimilarity], result of:
            0.10281316 = score(doc=3420,freq=5.0), product of:
              0.103220925 = queryWeight, product of:
                1.0341768 = boost
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.017505199 = queryNorm
              0.9960496 = fieldWeight in 3420, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.080644645 = weight(abstract_txt:recall in 3420) [ClassicSimilarity], result of:
            0.080644645 = score(doc=3420,freq=3.0), product of:
              0.10408829 = queryWeight, product of:
                1.0385128 = boost
                5.725626 = idf(docFreq=371, maxDocs=41962)
                0.017505199 = queryNorm
              0.7747715 = fieldWeight in 3420, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                5.725626 = idf(docFreq=371, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.052450284 = weight(abstract_txt:improving in 3420) [ClassicSimilarity], result of:
            0.052450284 = score(doc=3420,freq=1.0), product of:
              0.112691335 = queryWeight, product of:
                1.0805782 = boost
                5.9575443 = idf(docFreq=294, maxDocs=41962)
                0.017505199 = queryNorm
              0.46543315 = fieldWeight in 3420, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9575443 = idf(docFreq=294, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.024696376 = weight(abstract_txt:online in 3420) [ClassicSimilarity], result of:
            0.024696376 = score(doc=3420,freq=1.0), product of:
              0.0859325 = queryWeight, product of:
                1.3344573 = boost
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.017505199 = queryNorm
              0.28739274 = fieldWeight in 3420, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.041994423 = weight(abstract_txt:subject in 3420) [ClassicSimilarity], result of:
            0.041994423 = score(doc=3420,freq=2.0), product of:
              0.09716721 = queryWeight, product of:
                1.4190111 = boost
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.017505199 = queryNorm
              0.4321872 = fieldWeight in 3420, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.108615525 = weight(abstract_txt:searching in 3420) [ClassicSimilarity], result of:
            0.108615525 = score(doc=3420,freq=2.0), product of:
              0.2306729 = queryWeight, product of:
                3.091998 = boost
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.017505199 = queryNorm
              0.47086385 = fieldWeight in 3420, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
          0.36981395 = weight(abstract_txt:keywords in 3420) [ClassicSimilarity], result of:
            0.36981395 = score(doc=3420,freq=5.0), product of:
              0.34948716 = queryWeight, product of:
                3.2959998 = boost
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.017505199 = queryNorm
              1.0581617 = fieldWeight in 3420, product of:
                2.236068 = tf(freq=5.0), with freq of:
                  5.0 = termFreq=5.0
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.078125 = fieldNorm(doc=3420)
        0.32 = coord(8/25)
    
  3. Broadbent, E.: Classification access in the online catalog (1995) 0.27
    0.26527303 = sum of:
      0.26527303 = product of:
        0.82897824 = sum of:
          0.06294034 = weight(abstract_txt:improving in 572) [ClassicSimilarity], result of:
            0.06294034 = score(doc=572,freq=1.0), product of:
              0.112691335 = queryWeight, product of:
                1.0805782 = boost
                5.9575443 = idf(docFreq=294, maxDocs=41962)
                0.017505199 = queryNorm
              0.5585198 = fieldWeight in 572, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9575443 = idf(docFreq=294, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.027397478 = weight(abstract_txt:library in 572) [ClassicSimilarity], result of:
            0.027397478 = score(doc=572,freq=2.0), product of:
              0.06472591 = queryWeight, product of:
                1.1581506 = boost
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.017505199 = queryNorm
              0.42328453 = fieldWeight in 572, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.080558576 = weight(abstract_txt:call in 572) [ClassicSimilarity], result of:
            0.080558576 = score(doc=572,freq=1.0), product of:
              0.13284513 = queryWeight, product of:
                1.1732316 = boost
                6.46837 = idf(docFreq=176, maxDocs=41962)
                0.017505199 = queryNorm
              0.60640967 = fieldWeight in 572, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                6.46837 = idf(docFreq=176, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.051330455 = weight(abstract_txt:online in 572) [ClassicSimilarity], result of:
            0.051330455 = score(doc=572,freq=3.0), product of:
              0.0859325 = queryWeight, product of:
                1.3344573 = boost
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.017505199 = queryNorm
              0.59733456 = fieldWeight in 572, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.035633452 = weight(abstract_txt:subject in 572) [ClassicSimilarity], result of:
            0.035633452 = score(doc=572,freq=1.0), product of:
              0.09716721 = queryWeight, product of:
                1.4190111 = boost
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.017505199 = queryNorm
              0.366723 = fieldWeight in 572, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.13449071 = weight(abstract_txt:congress in 572) [ClassicSimilarity], result of:
            0.13449071 = score(doc=572,freq=2.0), product of:
              0.1869531 = queryWeight, product of:
                1.9683044 = boost
                5.4259195 = idf(docFreq=501, maxDocs=41962)
                0.017505199 = queryNorm
              0.7193821 = fieldWeight in 572, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.4259195 = idf(docFreq=501, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.09659427 = weight(abstract_txt:catalog in 572) [ClassicSimilarity], result of:
            0.09659427 = score(doc=572,freq=1.0), product of:
              0.18890728 = queryWeight, product of:
                1.9785649 = boost
                5.454204 = idf(docFreq=487, maxDocs=41962)
                0.017505199 = queryNorm
              0.5113316 = fieldWeight in 572, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.454204 = idf(docFreq=487, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
          0.340033 = weight(abstract_txt:numbers in 572) [ClassicSimilarity], result of:
            0.340033 = score(doc=572,freq=2.0), product of:
              0.43714803 = queryWeight, product of:
                4.256525 = boost
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.017505199 = queryNorm
              0.7778441 = fieldWeight in 572, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.09375 = fieldNorm(doc=572)
        0.32 = coord(8/25)
    
  4. Voorbij, H.: Title keywords and subject descriptors : a comparison of subject search entries of books in the humanities and social sciences (1998) 0.26
    0.25655684 = sum of:
      0.25655684 = product of:
        0.8017401 = sum of:
          0.09655681 = weight(abstract_txt:title in 722) [ClassicSimilarity], result of:
            0.09655681 = score(doc=722,freq=9.0), product of:
              0.103220925 = queryWeight, product of:
                1.0341768 = boost
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.017505199 = queryNorm
              0.9354384 = fieldWeight in 722, product of:
                3.0 = tf(freq=9.0), with freq of:
                  9.0 = termFreq=9.0
                5.70172 = idf(docFreq=380, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.032592144 = weight(abstract_txt:recall in 722) [ClassicSimilarity], result of:
            0.032592144 = score(doc=722,freq=1.0), product of:
              0.10408829 = queryWeight, product of:
                1.0385128 = boost
                5.725626 = idf(docFreq=371, maxDocs=41962)
                0.017505199 = queryNorm
              0.3131202 = fieldWeight in 722, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.725626 = idf(docFreq=371, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.011300883 = weight(abstract_txt:library in 722) [ClassicSimilarity], result of:
            0.011300883 = score(doc=722,freq=1.0), product of:
              0.06472591 = queryWeight, product of:
                1.1581506 = boost
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.017505199 = queryNorm
              0.17459597 = fieldWeight in 722, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.017287463 = weight(abstract_txt:online in 722) [ClassicSimilarity], result of:
            0.017287463 = score(doc=722,freq=1.0), product of:
              0.0859325 = queryWeight, product of:
                1.3344573 = boost
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.017505199 = queryNorm
              0.20117491 = fieldWeight in 722, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.678627 = idf(docFreq=2880, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.065731674 = weight(abstract_txt:subject in 722) [ClassicSimilarity], result of:
            0.065731674 = score(doc=722,freq=10.0), product of:
              0.09716721 = queryWeight, product of:
                1.4190111 = boost
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.017505199 = queryNorm
              0.67648 = fieldWeight in 722, product of:
                3.1622777 = tf(freq=10.0), with freq of:
                  10.0 = termFreq=10.0
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.27070013 = weight(abstract_txt:descriptors in 722) [ClassicSimilarity], result of:
            0.27070013 = score(doc=722,freq=7.0), product of:
              0.28116608 = queryWeight, product of:
                2.4138339 = boost
                6.654087 = idf(docFreq=146, maxDocs=41962)
                0.017505199 = queryNorm
              0.96277666 = fieldWeight in 722, product of:
                2.6457512 = tf(freq=7.0), with freq of:
                  7.0 = termFreq=7.0
                6.654087 = idf(docFreq=146, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.076030865 = weight(abstract_txt:searching in 722) [ClassicSimilarity], result of:
            0.076030865 = score(doc=722,freq=2.0), product of:
              0.2306729 = queryWeight, product of:
                3.091998 = boost
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.017505199 = queryNorm
              0.3296047 = fieldWeight in 722, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
          0.23154014 = weight(abstract_txt:keywords in 722) [ClassicSimilarity], result of:
            0.23154014 = score(doc=722,freq=4.0), product of:
              0.34948716 = queryWeight, product of:
                3.2959998 = boost
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.017505199 = queryNorm
              0.66251403 = fieldWeight in 722, product of:
                2.0 = tf(freq=4.0), with freq of:
                  4.0 = termFreq=4.0
                6.057271 = idf(docFreq=266, maxDocs=41962)
                0.0546875 = fieldNorm(doc=722)
        0.32 = coord(8/25)
    
  5. Saye, J.D.: ¬"The Library of Congress Classification System in an online environment" : a reaction (1990) 0.23
    0.22563152 = sum of:
      0.22563152 = product of:
        0.94013137 = sum of:
          0.019372944 = weight(abstract_txt:library in 1618) [ClassicSimilarity], result of:
            0.019372944 = score(doc=1618,freq=1.0), product of:
              0.06472591 = queryWeight, product of:
                1.1581506 = boost
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.017505199 = queryNorm
              0.29930738 = fieldWeight in 1618, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.192612 = idf(docFreq=4683, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
          0.13953155 = weight(abstract_txt:call in 1618) [ClassicSimilarity], result of:
            0.13953155 = score(doc=1618,freq=3.0), product of:
              0.13284513 = queryWeight, product of:
                1.1732316 = boost
                6.46837 = idf(docFreq=176, maxDocs=41962)
                0.017505199 = queryNorm
              1.0503324 = fieldWeight in 1618, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                6.46837 = idf(docFreq=176, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
          0.035633452 = weight(abstract_txt:subject in 1618) [ClassicSimilarity], result of:
            0.035633452 = score(doc=1618,freq=1.0), product of:
              0.09716721 = queryWeight, product of:
                1.4190111 = boost
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.017505199 = queryNorm
              0.366723 = fieldWeight in 1618, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                3.9117122 = idf(docFreq=2281, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
          0.15963158 = weight(abstract_txt:searching in 1618) [ClassicSimilarity], result of:
            0.15963158 = score(doc=1618,freq=3.0), product of:
              0.2306729 = queryWeight, product of:
                3.091998 = boost
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.017505199 = queryNorm
              0.6920257 = fieldWeight in 1618, product of:
                1.7320508 = tf(freq=3.0), with freq of:
                  3.0 = termFreq=3.0
                4.261773 = idf(docFreq=1607, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
          0.340033 = weight(abstract_txt:numbers in 1618) [ClassicSimilarity], result of:
            0.340033 = score(doc=1618,freq=2.0), product of:
              0.43714803 = queryWeight, product of:
                4.256525 = boost
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.017505199 = queryNorm
              0.7778441 = fieldWeight in 1618, product of:
                1.4142135 = tf(freq=2.0), with freq of:
                  2.0 = termFreq=2.0
                5.8668675 = idf(docFreq=322, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
          0.24592882 = weight(abstract_txt:class in 1618) [ClassicSimilarity], result of:
            0.24592882 = score(doc=1618,freq=1.0), product of:
              0.44377628 = queryWeight, product of:
                4.2886734 = boost
                5.9111786 = idf(docFreq=308, maxDocs=41962)
                0.017505199 = queryNorm
              0.554173 = fieldWeight in 1618, product of:
                1.0 = tf(freq=1.0), with freq of:
                  1.0 = termFreq=1.0
                5.9111786 = idf(docFreq=308, maxDocs=41962)
                0.09375 = fieldNorm(doc=1618)
        0.24 = coord(6/25)