Document (#1054)

Author

Larson, R.R.

Title

Experiments in automatic Library of Congress Classification

Source

Journal of the American Society for Information Science. 43(1992), S.130-148

Year

1992

Abstract

This article presents the results of research into the automatic selection of Library of Congress Classification numbers based on the titles and subject headings in MARC records. The method used in this study was based on partial match retrieval techniques using various elements of new recors (i.e., those to be classified) as "queries", and a test database of classification clusters generated from previously classified MARC records. Sixty individual methods for automatic classification were tested on a set of 283 new records, using all combinations of four different partial match methods, five query types, and three representations of search terms. The results indicate that if the best method for a particular case can be determined, then up to 86% of the new records may be correctly classified. The single method with the best accuracy was able to select the correct classification for about 46% of the new records.

Theme

Automatisches Klassifizieren
Indexierungsstudien

Object

LCC

Similar documents (author)

1. Larson, R.R.: Between Scylla and Charybdis : searching in the online catalog (1991) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:larson in 461) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 461, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=461)
   

2. Larson, R.R.: Evaluation of advanced retrieval techniques in an experimental online catalog (1992) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:larson in 480) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 480, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=480)
   

3. Larson, R.R.: Classification clustering, probabilistic information retrieval, and the online catalog (1991) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:larson in 1069) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 1069, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=1069)
   

4. Larson, R.R.: ¬The decline of subject searching : long-term trends and patterns of index use in an online catalog (1991) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:larson in 1103) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 1103, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=1103)
   

5. Larson, R.R.: Users look at online catalogs : Pt.2: interacting with online catalogs. Final report for the Council on Library Resources (1983) 5.21

   5.2088575 = sum of:
     5.2088575 = weight(author_txt:larson in 2423) [ClassicSimilarity], result of:
       5.2088575 = fieldWeight in 2423, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.334172 = idf(docFreq=28, maxDocs=44421)
         0.625 = fieldNorm(doc=2423)
   

Similar documents (content)

1. Goren-Bar, D.; Kuflik, T.: Supporting user-subjective categorization with self-organizing maps and learning vector quantization (2005) 0.25

   0.24901155 = sum of:
     0.24901155 = product of:
       0.69169873 = sum of:
         0.013421757 = weight(abstract_txt:based in 4325) [ClassicSimilarity], result of:
           0.013421757 = score(doc=4325,freq=1.0), product of:
             0.06746561 = queryWeight, product of:
               1.0689954 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019827126 = queryNorm
             0.1989422 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.017191673 = weight(abstract_txt:using in 4325) [ClassicSimilarity], result of:
           0.017191673 = score(doc=4325,freq=1.0), product of:
             0.07957103 = queryWeight, product of:
               1.1609461 = boost
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.019827126 = queryNorm
             0.21605442 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.024775032 = weight(abstract_txt:results in 4325) [ClassicSimilarity], result of:
           0.024775032 = score(doc=4325,freq=2.0), product of:
             0.08057662 = queryWeight, product of:
               1.1682589 = boost
               3.4786456 = idf(docFreq=3724, maxDocs=44421)
               0.019827126 = queryNorm
             0.30747172 = fieldWeight in 4325, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4786456 = idf(docFreq=3724, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.0296048 = weight(abstract_txt:methods in 4325) [ClassicSimilarity], result of:
           0.0296048 = score(doc=4325,freq=1.0), product of:
             0.114318796 = queryWeight, product of:
               1.3915327 = boost
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.019827126 = queryNorm
             0.25896704 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1434727 = idf(docFreq=1915, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.10750559 = weight(abstract_txt:match in 4325) [ClassicSimilarity], result of:
           0.10750559 = score(doc=4325,freq=1.0), product of:
             0.2700828 = queryWeight, product of:
               2.1388633 = boost
               6.3687487 = idf(docFreq=206, maxDocs=44421)
               0.019827126 = queryNorm
             0.3980468 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3687487 = idf(docFreq=206, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.056839723 = weight(abstract_txt:method in 4325) [ClassicSimilarity], result of:
           0.056839723 = score(doc=4325,freq=1.0), product of:
             0.2021504 = queryWeight, product of:
               2.2663007 = boost
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.019827126 = queryNorm
             0.2811754 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.17511284 = weight(abstract_txt:automatic in 4325) [ClassicSimilarity], result of:
           0.17511284 = score(doc=4325,freq=4.0), product of:
             0.2696282 = queryWeight, product of:
               2.6173565 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.019827126 = queryNorm
             0.64946043 = fieldWeight in 4325, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.20105122 = weight(abstract_txt:classified in 4325) [ClassicSimilarity], result of:
           0.20105122 = score(doc=4325,freq=2.0), product of:
             0.37247843 = queryWeight, product of:
               3.076315 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019827126 = queryNorm
             0.5397661 = fieldWeight in 4325, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
         0.066196084 = weight(abstract_txt:classification in 4325) [ClassicSimilarity], result of:
           0.066196084 = score(doc=4325,freq=1.0), product of:
             0.2653044 = queryWeight, product of:
               3.35179 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019827126 = queryNorm
             0.24950996 = fieldWeight in 4325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=4325)
       0.36 = coord(9/25)
   

2. Broadbent, E.: ¬The online catalog : dictionary, classified, or both? (1989) 0.24

   0.24225019 = sum of:
     0.24225019 = product of:
       0.86517924 = sum of:
         0.016869232 = weight(abstract_txt:library in 582) [ClassicSimilarity], result of:
           0.016869232 = score(doc=582,freq=1.0), product of:
             0.06771212 = queryWeight, product of:
               1.0709466 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019827126 = queryNorm
             0.24913163 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.02148959 = weight(abstract_txt:using in 582) [ClassicSimilarity], result of:
           0.02148959 = score(doc=582,freq=1.0), product of:
             0.07957103 = queryWeight, product of:
               1.1609461 = boost
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.019827126 = queryNorm
             0.27006802 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.082029015 = weight(abstract_txt:congress in 582) [ClassicSimilarity], result of:
           0.082029015 = score(doc=582,freq=1.0), product of:
             0.1943485 = queryWeight, product of:
               1.8143672 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019827126 = queryNorm
             0.42207175 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.08678732 = weight(abstract_txt:marc in 582) [ClassicSimilarity], result of:
           0.08678732 = score(doc=582,freq=1.0), product of:
             0.20179345 = queryWeight, product of:
               1.8487922 = boost
               5.5050235 = idf(docFreq=490, maxDocs=44421)
               0.019827126 = queryNorm
             0.43007997 = fieldWeight in 582, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5050235 = idf(docFreq=490, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.3554117 = weight(abstract_txt:classified in 582) [ClassicSimilarity], result of:
           0.3554117 = score(doc=582,freq=4.0), product of:
             0.37247843 = queryWeight, product of:
               3.076315 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019827126 = queryNorm
             0.95418066 = fieldWeight in 582, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.14331873 = weight(abstract_txt:classification in 582) [ClassicSimilarity], result of:
           0.14331873 = score(doc=582,freq=3.0), product of:
             0.2653044 = queryWeight, product of:
               3.35179 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019827126 = queryNorm
             0.5402049 = fieldWeight in 582, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
         0.15927364 = weight(abstract_txt:records in 582) [ClassicSimilarity], result of:
           0.15927364 = score(doc=582,freq=2.0), product of:
             0.32583833 = queryWeight, product of:
               3.7145455 = boost
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.019827126 = queryNorm
             0.48881188 = fieldWeight in 582, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.078125 = fieldNorm(doc=582)
       0.28 = coord(7/25)
   

3. Reiner, U.: DDC-based search in the data of the German National Bibliography (2008) 0.22

   0.2176636 = sum of:
     0.2176636 = product of:
       0.77737 = sum of:
         0.029058957 = weight(abstract_txt:based in 3166) [ClassicSimilarity], result of:
           0.029058957 = score(doc=3166,freq=3.0), product of:
             0.06746561 = queryWeight, product of:
               1.0689954 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019827126 = queryNorm
             0.4307225 = fieldWeight in 3166, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.016869232 = weight(abstract_txt:library in 3166) [ClassicSimilarity], result of:
           0.016869232 = score(doc=3166,freq=1.0), product of:
             0.06771212 = queryWeight, product of:
               1.0709466 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019827126 = queryNorm
             0.24913163 = fieldWeight in 3166, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.030390872 = weight(abstract_txt:using in 3166) [ClassicSimilarity], result of:
           0.030390872 = score(doc=3166,freq=2.0), product of:
             0.07957103 = queryWeight, product of:
               1.1609461 = boost
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.019827126 = queryNorm
             0.38193387 = fieldWeight in 3166, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.15477934 = weight(abstract_txt:automatic in 3166) [ClassicSimilarity], result of:
           0.15477934 = score(doc=3166,freq=2.0), product of:
             0.2696282 = queryWeight, product of:
               2.6173565 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.019827126 = queryNorm
             0.5740473 = fieldWeight in 3166, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.17770585 = weight(abstract_txt:classified in 3166) [ClassicSimilarity], result of:
           0.17770585 = score(doc=3166,freq=1.0), product of:
             0.37247843 = queryWeight, product of:
               3.076315 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019827126 = queryNorm
             0.47709033 = fieldWeight in 3166, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.14331873 = weight(abstract_txt:classification in 3166) [ClassicSimilarity], result of:
           0.14331873 = score(doc=3166,freq=3.0), product of:
             0.2653044 = queryWeight, product of:
               3.35179 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019827126 = queryNorm
             0.5402049 = fieldWeight in 3166, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
         0.22524697 = weight(abstract_txt:records in 3166) [ClassicSimilarity], result of:
           0.22524697 = score(doc=3166,freq=4.0), product of:
             0.32583833 = queryWeight, product of:
               3.7145455 = boost
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.019827126 = queryNorm
             0.6912844 = fieldWeight in 3166, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.078125 = fieldNorm(doc=3166)
       0.28 = coord(7/25)
   

4. Jansen, B.J.; Booth, D.L.; Spink, A.: Determining the informational, navigational, and transactional intent of Web queries (2008) 0.19

   0.19177058 = sum of:
     0.19177058 = product of:
       0.5992831 = sum of:
         0.06215226 = weight(abstract_txt:accuracy in 3091) [ClassicSimilarity], result of:
           0.06215226 = score(doc=3091,freq=2.0), product of:
             0.11807578 = queryWeight, product of:
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.019827126 = queryNorm
             0.526376 = fieldWeight in 3091, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.055016313 = weight(abstract_txt:determined in 3091) [ClassicSimilarity], result of:
           0.055016313 = score(doc=3091,freq=1.0), product of:
             0.1371494 = queryWeight, product of:
               1.0777463 = boost
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.019827126 = queryNorm
             0.4011415 = fieldWeight in 3091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.418264 = idf(docFreq=196, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.017191673 = weight(abstract_txt:using in 3091) [ClassicSimilarity], result of:
           0.017191673 = score(doc=3091,freq=1.0), product of:
             0.07957103 = queryWeight, product of:
               1.1609461 = boost
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.019827126 = queryNorm
             0.21605442 = fieldWeight in 3091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.030343095 = weight(abstract_txt:results in 3091) [ClassicSimilarity], result of:
           0.030343095 = score(doc=3091,freq=3.0), product of:
             0.08057662 = queryWeight, product of:
               1.1682589 = boost
               3.4786456 = idf(docFreq=3724, maxDocs=44421)
               0.019827126 = queryNorm
             0.37657443 = fieldWeight in 3091, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.4786456 = idf(docFreq=3724, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.056839723 = weight(abstract_txt:method in 3091) [ClassicSimilarity], result of:
           0.056839723 = score(doc=3091,freq=1.0), product of:
             0.2021504 = queryWeight, product of:
               2.2663007 = boost
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.019827126 = queryNorm
             0.2811754 = fieldWeight in 3091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.08755642 = weight(abstract_txt:automatic in 3091) [ClassicSimilarity], result of:
           0.08755642 = score(doc=3091,freq=1.0), product of:
             0.2696282 = queryWeight, product of:
               2.6173565 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.019827126 = queryNorm
             0.32473022 = fieldWeight in 3091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.14216468 = weight(abstract_txt:classified in 3091) [ClassicSimilarity], result of:
           0.14216468 = score(doc=3091,freq=1.0), product of:
             0.37247843 = queryWeight, product of:
               3.076315 = boost
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.019827126 = queryNorm
             0.38167226 = fieldWeight in 3091, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.106756 = idf(docFreq=268, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
         0.14801896 = weight(abstract_txt:classification in 3091) [ClassicSimilarity], result of:
           0.14801896 = score(doc=3091,freq=5.0), product of:
             0.2653044 = queryWeight, product of:
               3.35179 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019827126 = queryNorm
             0.55792123 = fieldWeight in 3091, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.0625 = fieldNorm(doc=3091)
       0.32 = coord(8/25)
   

5. Chan, L.M.: Library of Congress Classification : alternative provisions (1995) 0.19

   0.19163875 = sum of:
     0.19163875 = product of:
       0.6844241 = sum of:
         0.016777197 = weight(abstract_txt:based in 541) [ClassicSimilarity], result of:
           0.016777197 = score(doc=541,freq=1.0), product of:
             0.06746561 = queryWeight, product of:
               1.0689954 = boost
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.019827126 = queryNorm
             0.24867775 = fieldWeight in 541, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1830752 = idf(docFreq=5005, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.029218366 = weight(abstract_txt:library in 541) [ClassicSimilarity], result of:
           0.029218366 = score(doc=541,freq=3.0), product of:
             0.06771212 = queryWeight, product of:
               1.0709466 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019827126 = queryNorm
             0.43150866 = fieldWeight in 541, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.02148959 = weight(abstract_txt:using in 541) [ClassicSimilarity], result of:
           0.02148959 = score(doc=541,freq=1.0), product of:
             0.07957103 = queryWeight, product of:
               1.1609461 = boost
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.019827126 = queryNorm
             0.27006802 = fieldWeight in 541, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4568708 = idf(docFreq=3806, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.11600654 = weight(abstract_txt:congress in 541) [ClassicSimilarity], result of:
           0.11600654 = score(doc=541,freq=2.0), product of:
             0.1943485 = queryWeight, product of:
               1.8143672 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019827126 = queryNorm
             0.59689957 = fieldWeight in 541, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.122735806 = weight(abstract_txt:marc in 541) [ClassicSimilarity], result of:
           0.122735806 = score(doc=541,freq=2.0), product of:
             0.20179345 = queryWeight, product of:
               1.8487922 = boost
               5.5050235 = idf(docFreq=490, maxDocs=44421)
               0.019827126 = queryNorm
             0.6082249 = fieldWeight in 541, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5050235 = idf(docFreq=490, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.21892297 = weight(abstract_txt:classification in 541) [ClassicSimilarity], result of:
           0.21892297 = score(doc=541,freq=7.0), product of:
             0.2653044 = queryWeight, product of:
               3.35179 = boost
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.019827126 = queryNorm
             0.8251766 = fieldWeight in 541, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.9921594 = idf(docFreq=2228, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
         0.15927364 = weight(abstract_txt:records in 541) [ClassicSimilarity], result of:
           0.15927364 = score(doc=541,freq=2.0), product of:
             0.32583833 = queryWeight, product of:
               3.7145455 = boost
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.019827126 = queryNorm
             0.48881188 = fieldWeight in 541, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.42422 = idf(docFreq=1446, maxDocs=44421)
               0.078125 = fieldNorm(doc=541)
       0.28 = coord(7/25)