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) 6.05

   6.0538187 = sum of:
     6.0538187 = weight(author_txt:frank in 5366) [ClassicSimilarity], result of:
       6.0538187 = fieldWeight in 5366, product of:
         1.4142135 = tf(freq=2.0), with freq of:
           2.0 = termFreq=2.0
         8.561393 = idf(docFreq=22, maxDocs=44218)
         0.5 = fieldNorm(doc=5366)
   

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

   5.3508706 = sum of:
     5.3508706 = weight(author_txt:frank in 3352) [ClassicSimilarity], result of:
       5.3508706 = fieldWeight in 3352, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.561393 = idf(docFreq=22, maxDocs=44218)
         0.625 = fieldNorm(doc=3352)
   

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

   5.3508706 = sum of:
     5.3508706 = weight(author_txt:frank in 3496) [ClassicSimilarity], result of:
       5.3508706 = fieldWeight in 3496, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.561393 = idf(docFreq=22, maxDocs=44218)
         0.625 = fieldNorm(doc=3496)
   

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

   5.3508706 = sum of:
     5.3508706 = weight(author_txt:frank in 8322) [ClassicSimilarity], result of:
       5.3508706 = fieldWeight in 8322, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.561393 = idf(docFreq=22, maxDocs=44218)
         0.625 = fieldNorm(doc=8322)
   

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

   5.3508706 = sum of:
     5.3508706 = weight(author_txt:frank in 2350) [ClassicSimilarity], result of:
       5.3508706 = fieldWeight in 2350, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.561393 = idf(docFreq=22, maxDocs=44218)
         0.625 = fieldNorm(doc=2350)
   

Similar documents (content)

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

   0.33297634 = sum of:
     0.33297634 = product of:
       1.0405511 = sum of:
         0.012131012 = weight(abstract_txt:that in 6162) [ClassicSimilarity], result of:
           0.012131012 = score(doc=6162,freq=3.0), product of:
             0.047293805 = queryWeight, product of:
               1.0455031 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.019090915 = queryNorm
             0.2565032 = fieldWeight in 6162, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.051274423 = weight(abstract_txt:subject in 6162) [ClassicSimilarity], result of:
           0.051274423 = score(doc=6162,freq=6.0), product of:
             0.085723445 = queryWeight, product of:
               1.1492841 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019090915 = queryNorm
             0.5981377 = fieldWeight in 6162, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.11753709 = weight(abstract_txt:headings in 6162) [ClassicSimilarity], result of:
           0.11753709 = score(doc=6162,freq=6.0), product of:
             0.14903298 = queryWeight, product of:
               1.5153704 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019090915 = queryNorm
             0.78866494 = fieldWeight in 6162, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.22048385 = weight(abstract_txt:hierarchy in 6162) [ClassicSimilarity], result of:
           0.22048385 = score(doc=6162,freq=5.0), product of:
             0.24088554 = queryWeight, product of:
               1.9265618 = boost
               6.5493927 = idf(docFreq=171, maxDocs=44218)
               0.019090915 = queryNorm
             0.9153055 = fieldWeight in 6162, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.5493927 = idf(docFreq=171, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.19495858 = weight(abstract_txt:tree in 6162) [ClassicSimilarity], result of:
           0.19495858 = score(doc=6162,freq=3.0), product of:
             0.26311 = queryWeight, product of:
               2.0134752 = boost
               6.8448567 = idf(docFreq=127, maxDocs=44218)
               0.019090915 = queryNorm
             0.74097747 = fieldWeight in 6162, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.8448567 = idf(docFreq=127, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.040158253 = weight(abstract_txt:library in 6162) [ClassicSimilarity], result of:
           0.040158253 = score(doc=6162,freq=2.0), product of:
             0.14257261 = queryWeight, product of:
               2.3435037 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.019090915 = queryNorm
             0.28166878 = fieldWeight in 6162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.156461 = weight(abstract_txt:congress in 6162) [ClassicSimilarity], result of:
           0.156461 = score(doc=6162,freq=2.0), product of:
             0.32770792 = queryWeight, product of:
               3.1778696 = boost
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.019090915 = queryNorm
             0.4774404 = fieldWeight in 6162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
         0.2475468 = weight(abstract_txt:lcsh in 6162) [ClassicSimilarity], result of:
           0.2475468 = score(doc=6162,freq=2.0), product of:
             0.44496015 = queryWeight, product of:
               3.702995 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.019090915 = queryNorm
             0.5563348 = fieldWeight in 6162, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.0625 = fieldNorm(doc=6162)
       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

   0.31397942 = sum of:
     0.31397942 = product of:
       1.121355 = sum of:
         0.037004124 = weight(abstract_txt:subject in 512) [ClassicSimilarity], result of:
           0.037004124 = score(doc=512,freq=2.0), product of:
             0.085723445 = queryWeight, product of:
               1.1492841 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019090915 = queryNorm
             0.43166864 = fieldWeight in 512, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.05998039 = weight(abstract_txt:headings in 512) [ClassicSimilarity], result of:
           0.05998039 = score(doc=512,freq=1.0), product of:
             0.14903298 = queryWeight, product of:
               1.5153704 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019090915 = queryNorm
             0.40246385 = fieldWeight in 512, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.018526247 = weight(abstract_txt:from in 512) [ClassicSimilarity], result of:
           0.018526247 = score(doc=512,freq=1.0), product of:
             0.08579813 = queryWeight, product of:
               1.626041 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.019090915 = queryNorm
             0.21592833 = fieldWeight in 512, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.2813985 = weight(abstract_txt:tree in 512) [ClassicSimilarity], result of:
           0.2813985 = score(doc=512,freq=4.0), product of:
             0.26311 = queryWeight, product of:
               2.0134752 = boost
               6.8448567 = idf(docFreq=127, maxDocs=44218)
               0.019090915 = queryNorm
             1.0695089 = fieldWeight in 512, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               6.8448567 = idf(docFreq=127, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.050197817 = weight(abstract_txt:library in 512) [ClassicSimilarity], result of:
           0.050197817 = score(doc=512,freq=2.0), product of:
             0.14257261 = queryWeight, product of:
               2.3435037 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.019090915 = queryNorm
             0.35208598 = fieldWeight in 512, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.13829328 = weight(abstract_txt:congress in 512) [ClassicSimilarity], result of:
           0.13829328 = score(doc=512,freq=1.0), product of:
             0.32770792 = queryWeight, product of:
               3.1778696 = boost
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.019090915 = queryNorm
             0.42200166 = fieldWeight in 512, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
         0.53595465 = weight(abstract_txt:lcsh in 512) [ClassicSimilarity], result of:
           0.53595465 = score(doc=512,freq=6.0), product of:
             0.44496015 = queryWeight, product of:
               3.702995 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.019090915 = queryNorm
             1.2045003 = fieldWeight in 512, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.078125 = fieldNorm(doc=512)
       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

   0.26705354 = sum of:
     0.26705354 = product of:
       0.95376265 = sum of:
         0.014857396 = weight(abstract_txt:that in 1935) [ClassicSimilarity], result of:
           0.014857396 = score(doc=1935,freq=2.0), product of:
             0.047293805 = queryWeight, product of:
               1.0455031 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.019090915 = queryNorm
             0.314151 = fieldWeight in 1935, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.09375 = fieldNorm(doc=1935)
         0.03139904 = weight(abstract_txt:subject in 1935) [ClassicSimilarity], result of:
           0.03139904 = score(doc=1935,freq=1.0), product of:
             0.085723445 = queryWeight, product of:
               1.1492841 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019090915 = queryNorm
             0.366283 = fieldWeight in 1935, 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=1935)
         0.07197647 = weight(abstract_txt:headings in 1935) [ClassicSimilarity], result of:
           0.07197647 = score(doc=1935,freq=1.0), product of:
             0.14903298 = queryWeight, product of:
               1.5153704 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019090915 = queryNorm
             0.48295665 = fieldWeight in 1935, 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=1935)
         0.022231497 = weight(abstract_txt:from in 1935) [ClassicSimilarity], result of:
           0.022231497 = score(doc=1935,freq=1.0), product of:
             0.08579813 = queryWeight, product of:
               1.626041 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.019090915 = queryNorm
             0.259114 = fieldWeight in 1935, 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=1935)
         0.06023738 = weight(abstract_txt:library in 1935) [ClassicSimilarity], result of:
           0.06023738 = score(doc=1935,freq=2.0), product of:
             0.14257261 = queryWeight, product of:
               2.3435037 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.019090915 = queryNorm
             0.42250317 = fieldWeight in 1935, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.09375 = fieldNorm(doc=1935)
         0.16595195 = weight(abstract_txt:congress in 1935) [ClassicSimilarity], result of:
           0.16595195 = score(doc=1935,freq=1.0), product of:
             0.32770792 = queryWeight, product of:
               3.1778696 = boost
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.019090915 = queryNorm
             0.506402 = fieldWeight in 1935, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.09375 = fieldNorm(doc=1935)
         0.5871089 = weight(abstract_txt:lcsh in 1935) [ClassicSimilarity], result of:
           0.5871089 = score(doc=1935,freq=5.0), product of:
             0.44496015 = queryWeight, product of:
               3.702995 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.019090915 = queryNorm
             1.319464 = fieldWeight in 1935, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.09375 = fieldNorm(doc=1935)
       0.28 = coord(7/25)
   

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

   0.2613623 = sum of:
     0.2613623 = product of:
       0.9334368 = sum of:
         0.01750961 = weight(abstract_txt:that in 449) [ClassicSimilarity], result of:
           0.01750961 = score(doc=449,freq=4.0), product of:
             0.047293805 = queryWeight, product of:
               1.0455031 = boost
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.019090915 = queryNorm
             0.3702305 = fieldWeight in 449, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.3694751 = idf(docFreq=11241, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.04532061 = weight(abstract_txt:subject in 449) [ClassicSimilarity], result of:
           0.04532061 = score(doc=449,freq=3.0), product of:
             0.085723445 = queryWeight, product of:
               1.1492841 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019090915 = queryNorm
             0.52868396 = fieldWeight in 449, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.11996078 = weight(abstract_txt:headings in 449) [ClassicSimilarity], result of:
           0.11996078 = score(doc=449,freq=4.0), product of:
             0.14903298 = queryWeight, product of:
               1.5153704 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019090915 = queryNorm
             0.8049277 = fieldWeight in 449, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.026200071 = weight(abstract_txt:from in 449) [ClassicSimilarity], result of:
           0.026200071 = score(doc=449,freq=2.0), product of:
             0.08579813 = queryWeight, product of:
               1.626041 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.019090915 = queryNorm
             0.30536878 = fieldWeight in 449, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.050197817 = weight(abstract_txt:library in 449) [ClassicSimilarity], result of:
           0.050197817 = score(doc=449,freq=2.0), product of:
             0.14257261 = queryWeight, product of:
               2.3435037 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.019090915 = queryNorm
             0.35208598 = fieldWeight in 449, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.13829328 = weight(abstract_txt:congress in 449) [ClassicSimilarity], result of:
           0.13829328 = score(doc=449,freq=1.0), product of:
             0.32770792 = queryWeight, product of:
               3.1778696 = boost
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.019090915 = queryNorm
             0.42200166 = fieldWeight in 449, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
         0.53595465 = weight(abstract_txt:lcsh in 449) [ClassicSimilarity], result of:
           0.53595465 = score(doc=449,freq=6.0), product of:
             0.44496015 = queryWeight, product of:
               3.702995 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.019090915 = queryNorm
             1.2045003 = fieldWeight in 449, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.078125 = fieldNorm(doc=449)
       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

   0.2606997 = sum of:
     0.2606997 = product of:
       0.9310703 = sum of:
         0.03625649 = weight(abstract_txt:subject in 834) [ClassicSimilarity], result of:
           0.03625649 = score(doc=834,freq=3.0), product of:
             0.085723445 = queryWeight, product of:
               1.1492841 = boost
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.019090915 = queryNorm
             0.42294717 = fieldWeight in 834, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9070187 = idf(docFreq=2415, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.04798431 = weight(abstract_txt:headings in 834) [ClassicSimilarity], result of:
           0.04798431 = score(doc=834,freq=1.0), product of:
             0.14903298 = queryWeight, product of:
               1.5153704 = boost
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.019090915 = queryNorm
             0.3219711 = fieldWeight in 834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1515374 = idf(docFreq=695, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.014820998 = weight(abstract_txt:from in 834) [ClassicSimilarity], result of:
           0.014820998 = score(doc=834,freq=1.0), product of:
             0.08579813 = queryWeight, product of:
               1.626041 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.019090915 = queryNorm
             0.17274266 = fieldWeight in 834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.13944623 = weight(abstract_txt:hierarchy in 834) [ClassicSimilarity], result of:
           0.13944623 = score(doc=834,freq=2.0), product of:
             0.24088554 = queryWeight, product of:
               1.9265618 = boost
               6.5493927 = idf(docFreq=171, maxDocs=44218)
               0.019090915 = queryNorm
             0.57888997 = fieldWeight in 834, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.5493927 = idf(docFreq=171, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.028396176 = weight(abstract_txt:library in 834) [ClassicSimilarity], result of:
           0.028396176 = score(doc=834,freq=1.0), product of:
             0.14257261 = queryWeight, product of:
               2.3435037 = boost
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.019090915 = queryNorm
             0.19916992 = fieldWeight in 834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1867187 = idf(docFreq=4964, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.11063463 = weight(abstract_txt:congress in 834) [ClassicSimilarity], result of:
           0.11063463 = score(doc=834,freq=1.0), product of:
             0.32770792 = queryWeight, product of:
               3.1778696 = boost
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.019090915 = queryNorm
             0.33760133 = fieldWeight in 834, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.4016213 = idf(docFreq=541, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
         0.5535315 = weight(abstract_txt:lcsh in 834) [ClassicSimilarity], result of:
           0.5535315 = score(doc=834,freq=10.0), product of:
             0.44496015 = queryWeight, product of:
               3.702995 = boost
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.019090915 = queryNorm
             1.2440025 = fieldWeight in 834, product of:
               3.1622777 = tf(freq=10.0), with freq of:
                 10.0 = termFreq=10.0
               6.29421 = idf(docFreq=221, maxDocs=44218)
               0.0625 = fieldNorm(doc=834)
       0.28 = coord(7/25)