Document (#27219)

Author

Frank, E.
Paynter, G.W.

Title

Predicting Library of Congress Classifications from Library of Congress Subject Headings

Source

Journal of the American Society for Information Science and technology. 55(2004) no.3, S.214-227

Year

2004

Abstract

This paper addresses the problem of automatically assigning a Library of Congress Classification (LCC) to a work given its set of Library of Congress Subject Headings (LCSH). LCCs are organized in a tree: The root node of this hierarchy comprises all possible topics, and leaf nodes correspond to the most specialized topic areas defined. We describe a procedure that, given a resource identified by its LCSH, automatically places that resource in the LCC hierarchy. The procedure uses machine learning techniques and training data from a large library catalog to learn a model that maps from sets of LCSH to classifications from the LCC tree. We present empirical results for our technique showing its accuracy an an independent collection of 50,000 LCSH/LCC pairs.

Theme

Automatisches Klassifizieren

Object

LCC
LCSH

Similar documents (author)

1. Frank, S.; Frank, M.: Spannungsfeld zwischen Bibliotheks-/Informationswissenschaft und Bibliotheksinformatik : Teil 1 von: Bibliothekarische Studiengänge an der HTWK Leipzig: Veränderung und Kontinuität (2019) 6.06

   6.057058 = sum of:
     6.057058 = weight(author_txt:frank in 366) [ClassicSimilarity], result of:
       6.057058 = fieldWeight in 366, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         8.565973 = idf(docFreq=22, maxDocs=44421)
         0.5 = fieldNorm(doc=366)
   

2. Frank, S.: Cataloging digital geographic data in the information infrastructure (1997) 5.35

   5.353733 = sum of:
     5.353733 = weight(author_txt:frank in 3351) [ClassicSimilarity], result of:
       5.353733 = fieldWeight in 3351, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.565973 = idf(docFreq=22, maxDocs=44421)
         0.625 = fieldNorm(doc=3351)
   

3. Frank, O.: Handbuch der Klassifikation. H.1-12 (1953-1968) 5.35

   5.353733 = sum of:
     5.353733 = weight(author_txt:frank in 3495) [ClassicSimilarity], result of:
       5.353733 = fieldWeight in 3495, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.565973 = idf(docFreq=22, maxDocs=44421)
         0.625 = fieldNorm(doc=3495)
   

4. Frank, S.: Cataloguing digital geographic data in the information infrastructure : a literature and technology review (1994) 5.35

   5.353733 = sum of:
     5.353733 = weight(author_txt:frank in 8321) [ClassicSimilarity], result of:
       5.353733 = fieldWeight in 8321, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.565973 = idf(docFreq=22, maxDocs=44421)
         0.625 = fieldNorm(doc=8321)
   

5. Frank, N.: ¬Die Renovierung der ethnologischen Terminologie in der Schlagwortnormdatei (2008) 5.35

   5.353733 = sum of:
     5.353733 = weight(author_txt:frank in 3350) [ClassicSimilarity], result of:
       5.353733 = fieldWeight in 3350, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.565973 = idf(docFreq=22, maxDocs=44421)
         0.625 = fieldNorm(doc=3350)
   

Similar documents (content)

1. Weinberg, B.H.: ¬The hidden classification in Library of Congress Subject Headings for Judaica (1993) 0.33

   0.3333341 = sum of:
     0.3333341 = product of:
       1.041669 = sum of:
         0.012060611 = weight(abstract_txt:that in 6161) [ClassicSimilarity], result of:
           0.012060611 = score(doc=6161,freq=3.0), product of:
             0.047109604 = queryWeight, product of:
               1.0450732 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.019060906 = queryNorm
             0.25601172 = fieldWeight in 6161, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.051386286 = weight(abstract_txt:subject in 6161) [ClassicSimilarity], result of:
           0.051386286 = score(doc=6161,freq=6.0), product of:
             0.08584618 = queryWeight, product of:
               1.1518788 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019060906 = queryNorm
             0.5985856 = fieldWeight in 6161, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.11764638 = weight(abstract_txt:headings in 6161) [ClassicSimilarity], result of:
           0.11764638 = score(doc=6161,freq=6.0), product of:
             0.14912204 = queryWeight, product of:
               1.5181589 = boost
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.019060906 = queryNorm
             0.78892684 = fieldWeight in 6161, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.22093204 = weight(abstract_txt:hierarchy in 6161) [ClassicSimilarity], result of:
           0.22093204 = score(doc=6161,freq=5.0), product of:
             0.24120651 = queryWeight, product of:
               1.9308157 = boost
               6.553973 = idf(docFreq=171, maxDocs=44421)
               0.019060906 = queryNorm
             0.9159456 = fieldWeight in 6161, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.553973 = idf(docFreq=171, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.19533724 = weight(abstract_txt:tree in 6161) [ClassicSimilarity], result of:
           0.19533724 = score(doc=6161,freq=3.0), product of:
             0.26344472 = queryWeight, product of:
               2.0178602 = boost
               6.849437 = idf(docFreq=127, maxDocs=44421)
               0.019060906 = queryNorm
             0.7414733 = fieldWeight in 6161, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.849437 = idf(docFreq=127, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.040237524 = weight(abstract_txt:library in 6161) [ClassicSimilarity], result of:
           0.040237524 = score(doc=6161,freq=2.0), product of:
             0.142757 = queryWeight, product of:
               2.3486323 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019060906 = queryNorm
             0.28186026 = fieldWeight in 6161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.15652852 = weight(abstract_txt:congress in 6161) [ClassicSimilarity], result of:
           0.15652852 = score(doc=6161,freq=2.0), product of:
             0.3277949 = queryWeight, product of:
               3.183189 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019060906 = queryNorm
             0.47751966 = fieldWeight in 6161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
         0.24754046 = weight(abstract_txt:lcsh in 6161) [ClassicSimilarity], result of:
           0.24754046 = score(doc=6161,freq=2.0), product of:
             0.44494262 = queryWeight, product of:
               3.7086284 = boost
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.019060906 = queryNorm
             0.5563424 = fieldWeight in 6161, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.0625 = fieldNorm(doc=6161)
       0.32 = coord(8/25)
   

2. Julien, C.-A.; Tirilly, P.; Leide, J.E.; Guastavino, C.: Constructing a true LCSH tree of a science and engineering collection (2012) 0.31

   0.3141857 = sum of:
     0.3141857 = product of:
       1.1220918 = sum of:
         0.037084855 = weight(abstract_txt:subject in 1512) [ClassicSimilarity], result of:
           0.037084855 = score(doc=1512,freq=2.0), product of:
             0.08584618 = queryWeight, product of:
               1.1518788 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019060906 = queryNorm
             0.43199193 = fieldWeight in 1512, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
         0.060036164 = weight(abstract_txt:headings in 1512) [ClassicSimilarity], result of:
           0.060036164 = score(doc=1512,freq=1.0), product of:
             0.14912204 = queryWeight, product of:
               1.5181589 = boost
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.019060906 = queryNorm
             0.40259752 = fieldWeight in 1512, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
         0.018435003 = weight(abstract_txt:from in 1512) [ClassicSimilarity], result of:
           0.018435003 = score(doc=1512,freq=1.0), product of:
             0.085514285 = queryWeight, product of:
               1.6258507 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.019060906 = queryNorm
             0.21557805 = fieldWeight in 1512, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
         0.281945 = weight(abstract_txt:tree in 1512) [ClassicSimilarity], result of:
           0.281945 = score(doc=1512,freq=4.0), product of:
             0.26344472 = queryWeight, product of:
               2.0178602 = boost
               6.849437 = idf(docFreq=127, maxDocs=44421)
               0.019060906 = queryNorm
             1.0702245 = fieldWeight in 1512, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.849437 = idf(docFreq=127, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
         0.050296906 = weight(abstract_txt:library in 1512) [ClassicSimilarity], result of:
           0.050296906 = score(doc=1512,freq=2.0), product of:
             0.142757 = queryWeight, product of:
               2.3486323 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019060906 = queryNorm
             0.35232532 = fieldWeight in 1512, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
         0.13835298 = weight(abstract_txt:congress in 1512) [ClassicSimilarity], result of:
           0.13835298 = score(doc=1512,freq=1.0), product of:
             0.3277949 = queryWeight, product of:
               3.183189 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019060906 = queryNorm
             0.42207175 = fieldWeight in 1512, 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=1512)
         0.5359408 = weight(abstract_txt:lcsh in 1512) [ClassicSimilarity], result of:
           0.5359408 = score(doc=1512,freq=6.0), product of:
             0.44494262 = queryWeight, product of:
               3.7086284 = boost
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.019060906 = queryNorm
             1.2045166 = fieldWeight in 1512, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.078125 = fieldNorm(doc=1512)
       0.28 = coord(7/25)
   

3. Schwing, T.; McCutcheon, S.; Maurer, B.: Uniqueness matters : author-supplied keywords and LCSH in the library catalog (2012) 0.27

   0.26708576 = sum of:
     0.26708576 = product of:
       0.9538777 = sum of:
         0.014771173 = weight(abstract_txt:that in 2935) [ClassicSimilarity], result of:
           0.014771173 = score(doc=2935,freq=2.0), product of:
             0.047109604 = queryWeight, product of:
               1.0450732 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.019060906 = queryNorm
             0.31354907 = fieldWeight in 2935, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.031467546 = weight(abstract_txt:subject in 2935) [ClassicSimilarity], result of:
           0.031467546 = score(doc=2935,freq=1.0), product of:
             0.08584618 = queryWeight, product of:
               1.1518788 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019060906 = queryNorm
             0.36655733 = fieldWeight in 2935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.072043404 = weight(abstract_txt:headings in 2935) [ClassicSimilarity], result of:
           0.072043404 = score(doc=2935,freq=1.0), product of:
             0.14912204 = queryWeight, product of:
               1.5181589 = boost
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.019060906 = queryNorm
             0.48311704 = fieldWeight in 2935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.022122001 = weight(abstract_txt:from in 2935) [ClassicSimilarity], result of:
           0.022122001 = score(doc=2935,freq=1.0), product of:
             0.085514285 = queryWeight, product of:
               1.6258507 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.019060906 = queryNorm
             0.25869364 = fieldWeight in 2935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.06035629 = weight(abstract_txt:library in 2935) [ClassicSimilarity], result of:
           0.06035629 = score(doc=2935,freq=2.0), product of:
             0.142757 = queryWeight, product of:
               2.3486323 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019060906 = queryNorm
             0.4227904 = fieldWeight in 2935, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.16602355 = weight(abstract_txt:congress in 2935) [ClassicSimilarity], result of:
           0.16602355 = score(doc=2935,freq=1.0), product of:
             0.3277949 = queryWeight, product of:
               3.183189 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019060906 = queryNorm
             0.50648606 = fieldWeight in 2935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
         0.5870937 = weight(abstract_txt:lcsh in 2935) [ClassicSimilarity], result of:
           0.5870937 = score(doc=2935,freq=5.0), product of:
             0.44494262 = queryWeight, product of:
               3.7086284 = boost
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.019060906 = queryNorm
             1.3194818 = fieldWeight in 2935, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.09375 = fieldNorm(doc=2935)
       0.28 = coord(7/25)
   

4. Carlyle, A.: Matching LCSH and user vocabulary in the library catalog (1989) 0.26

   0.26139724 = sum of:
     0.26139724 = product of:
       0.93356156 = sum of:
         0.017407993 = weight(abstract_txt:that in 574) [ClassicSimilarity], result of:
           0.017407993 = score(doc=574,freq=4.0), product of:
             0.047109604 = queryWeight, product of:
               1.0450732 = boost
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.019060906 = queryNorm
             0.3695211 = fieldWeight in 574, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3649352 = idf(docFreq=11344, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
         0.045419488 = weight(abstract_txt:subject in 574) [ClassicSimilarity], result of:
           0.045419488 = score(doc=574,freq=3.0), product of:
             0.08584618 = queryWeight, product of:
               1.1518788 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019060906 = queryNorm
             0.5290799 = fieldWeight in 574, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
         0.12007233 = weight(abstract_txt:headings in 574) [ClassicSimilarity], result of:
           0.12007233 = score(doc=574,freq=4.0), product of:
             0.14912204 = queryWeight, product of:
               1.5181589 = boost
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.019060906 = queryNorm
             0.80519503 = fieldWeight in 574, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
         0.026071029 = weight(abstract_txt:from in 574) [ClassicSimilarity], result of:
           0.026071029 = score(doc=574,freq=2.0), product of:
             0.085514285 = queryWeight, product of:
               1.6258507 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.019060906 = queryNorm
             0.30487338 = fieldWeight in 574, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
         0.050296906 = weight(abstract_txt:library in 574) [ClassicSimilarity], result of:
           0.050296906 = score(doc=574,freq=2.0), product of:
             0.142757 = queryWeight, product of:
               2.3486323 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019060906 = queryNorm
             0.35232532 = fieldWeight in 574, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
         0.13835298 = weight(abstract_txt:congress in 574) [ClassicSimilarity], result of:
           0.13835298 = score(doc=574,freq=1.0), product of:
             0.3277949 = queryWeight, product of:
               3.183189 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019060906 = queryNorm
             0.42207175 = fieldWeight in 574, 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=574)
         0.5359408 = weight(abstract_txt:lcsh in 574) [ClassicSimilarity], result of:
           0.5359408 = score(doc=574,freq=6.0), product of:
             0.44494262 = queryWeight, product of:
               3.7086284 = boost
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.019060906 = queryNorm
             1.2045166 = fieldWeight in 574, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.078125 = fieldNorm(doc=574)
       0.28 = coord(7/25)
   

5. Julien, C.-A.; Tirilly, P.; Leide, J.E.; Guastavino, C.: Using the LCSH hierarchy to browse a collection (2012) 0.26

   0.26081836 = sum of:
     0.26081836 = product of:
       0.9314941 = sum of:
         0.03633559 = weight(abstract_txt:subject in 1834) [ClassicSimilarity], result of:
           0.03633559 = score(doc=1834,freq=3.0), product of:
             0.08584618 = queryWeight, product of:
               1.1518788 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.019060906 = queryNorm
             0.42326394 = fieldWeight in 1834, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.04802893 = weight(abstract_txt:headings in 1834) [ClassicSimilarity], result of:
           0.04802893 = score(doc=1834,freq=1.0), product of:
             0.14912204 = queryWeight, product of:
               1.5181589 = boost
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.019060906 = queryNorm
             0.32207802 = fieldWeight in 1834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1532483 = idf(docFreq=697, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.0147480015 = weight(abstract_txt:from in 1834) [ClassicSimilarity], result of:
           0.0147480015 = score(doc=1834,freq=1.0), product of:
             0.085514285 = queryWeight, product of:
               1.6258507 = boost
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.019060906 = queryNorm
             0.17246243 = fieldWeight in 1834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.759399 = idf(docFreq=7646, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.1397297 = weight(abstract_txt:hierarchy in 1834) [ClassicSimilarity], result of:
           0.1397297 = score(doc=1834,freq=2.0), product of:
             0.24120651 = queryWeight, product of:
               1.9308157 = boost
               6.553973 = idf(docFreq=171, maxDocs=44421)
               0.019060906 = queryNorm
             0.57929486 = fieldWeight in 1834, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.553973 = idf(docFreq=171, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.028452229 = weight(abstract_txt:library in 1834) [ClassicSimilarity], result of:
           0.028452229 = score(doc=1834,freq=1.0), product of:
             0.142757 = queryWeight, product of:
               2.3486323 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.019060906 = queryNorm
             0.19930531 = fieldWeight in 1834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.110682376 = weight(abstract_txt:congress in 1834) [ClassicSimilarity], result of:
           0.110682376 = score(doc=1834,freq=1.0), product of:
             0.3277949 = queryWeight, product of:
               3.183189 = boost
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.019060906 = queryNorm
             0.3376574 = fieldWeight in 1834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4025183 = idf(docFreq=543, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
         0.5535173 = weight(abstract_txt:lcsh in 1834) [ClassicSimilarity], result of:
           0.5535173 = score(doc=1834,freq=10.0), product of:
             0.44494262 = queryWeight, product of:
               3.7086284 = boost
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.019060906 = queryNorm
             1.2440195 = fieldWeight in 1834, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               6.294296 = idf(docFreq=222, maxDocs=44421)
               0.0625 = fieldNorm(doc=1834)
       0.28 = coord(7/25)