Document (#31011)

Author

Finn, A.
Kushmerick, N.

Title

Learning to classify documents according to genre

Source

Journal of the American Society for Information Science and Technology. 57(2006) no.11, S.1506-1518

Year

2006

Abstract

Current document-retrieval tools succeed in locating large numbers of documents relevant to a given query. While search results may be relevant according to the topic of the documents, it is more difficult to identify which of the relevant documents are most suitable for a particular user. Automatic genre analysis (i.e., the ability to distinguish documents according to style) would be a useful tool for identifying documents that are most suitable for a particular user. We investigate the use of machine learning for automatic genre classification. We introduce the idea of domain transfer-genre classifiers should be reusable across multiple topics-which does not arise in standard text classification. We investigate different features for building genre classifiers and their ability to transfer across multiple-topic domains. We also show how different feature-sets can be used in conjunction with each other to improve performance and reduce the number of documents that need to be labeled.

Footnote

Beitrag in einem Themenschwerpunkt "Computational analysis of style"

Theme

Automatisches Klassifizieren

Similar documents (content)

1. Lim, C.S.; Lee, K.J.; Kim, G.C.: Multiple sets of features for automatic genre classification of web documents (2005) 0.34

   0.34272435 = sum of:
     0.34272435 = product of:
       0.95201206 = sum of:
         0.022807278 = weight(abstract_txt:different in 1048) [ClassicSimilarity], result of:
           0.022807278 = score(doc=1048,freq=2.0), product of:
             0.07039552 = queryWeight, product of:
               1.053201 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.018234773 = queryNorm
             0.32398763 = fieldWeight in 1048, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.020084796 = weight(abstract_txt:most in 1048) [ClassicSimilarity], result of:
           0.020084796 = score(doc=1048,freq=1.0), product of:
             0.08148625 = queryWeight, product of:
               1.1331329 = boost
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.018234773 = queryNorm
             0.24648081 = fieldWeight in 1048, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.029462479 = weight(abstract_txt:classification in 1048) [ClassicSimilarity], result of:
           0.029462479 = score(doc=1048,freq=2.0), product of:
             0.083497904 = queryWeight, product of:
               1.1470345 = boost
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.018234773 = queryNorm
             0.3528529 = fieldWeight in 1048, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.060076546 = weight(abstract_txt:topic in 1048) [ClassicSimilarity], result of:
           0.060076546 = score(doc=1048,freq=2.0), product of:
             0.13426599 = queryWeight, product of:
               1.4545268 = boost
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.018234773 = queryNorm
             0.44744426 = fieldWeight in 1048, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.044397224 = weight(abstract_txt:multiple in 1048) [ClassicSimilarity], result of:
           0.044397224 = score(doc=1048,freq=1.0), product of:
             0.13827486 = queryWeight, product of:
               1.4760815 = boost
               5.137272 = idf(docFreq=705, maxDocs=44218)
               0.018234773 = queryNorm
             0.3210795 = fieldWeight in 1048, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.137272 = idf(docFreq=705, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.045926645 = weight(abstract_txt:automatic in 1048) [ClassicSimilarity], result of:
           0.045926645 = score(doc=1048,freq=1.0), product of:
             0.1414325 = queryWeight, product of:
               1.4928402 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.018234773 = queryNorm
             0.32472485 = fieldWeight in 1048, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.07093127 = weight(abstract_txt:according in 1048) [ClassicSimilarity], result of:
           0.07093127 = score(doc=1048,freq=1.0), product of:
             0.21631914 = queryWeight, product of:
               2.2611628 = boost
               5.2464166 = idf(docFreq=632, maxDocs=44218)
               0.018234773 = queryNorm
             0.32790104 = fieldWeight in 1048, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2464166 = idf(docFreq=632, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.24068607 = weight(abstract_txt:documents in 1048) [ClassicSimilarity], result of:
           0.24068607 = score(doc=1048,freq=9.0), product of:
             0.31146926 = queryWeight, product of:
               4.144578 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.018234773 = queryNorm
             0.77274424 = fieldWeight in 1048, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
         0.4176397 = weight(abstract_txt:genre in 1048) [ClassicSimilarity], result of:
           0.4176397 = score(doc=1048,freq=3.0), product of:
             0.5798471 = queryWeight, product of:
               4.779313 = boost
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.018234773 = queryNorm
             0.72025836 = fieldWeight in 1048, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.0625 = fieldNorm(doc=1048)
       0.36 = coord(9/25)
   

2. Liu, R.-L.: Dynamic category profiling for text filtering and classification (2007) 0.30

   0.29610386 = sum of:
     0.29610386 = product of:
       0.92532456 = sum of:
         0.069023155 = weight(abstract_txt:distinguish in 900) [ClassicSimilarity], result of:
           0.069023155 = score(doc=900,freq=1.0), product of:
             0.12692657 = queryWeight, product of:
               6.9606886 = idf(docFreq=113, maxDocs=44218)
               0.018234773 = queryNorm
             0.5438038 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.9606886 = idf(docFreq=113, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.020158978 = weight(abstract_txt:different in 900) [ClassicSimilarity], result of:
           0.020158978 = score(doc=900,freq=1.0), product of:
             0.07039552 = queryWeight, product of:
               1.053201 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.018234773 = queryNorm
             0.28636733 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.0260414 = weight(abstract_txt:classification in 900) [ClassicSimilarity], result of:
           0.0260414 = score(doc=900,freq=1.0), product of:
             0.083497904 = queryWeight, product of:
               1.1470345 = boost
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.018234773 = queryNorm
             0.3118809 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.05740831 = weight(abstract_txt:automatic in 900) [ClassicSimilarity], result of:
           0.05740831 = score(doc=900,freq=1.0), product of:
             0.1414325 = queryWeight, product of:
               1.4928402 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.018234773 = queryNorm
             0.40590608 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.09102707 = weight(abstract_txt:suitable in 900) [ClassicSimilarity], result of:
           0.09102707 = score(doc=900,freq=1.0), product of:
             0.19231497 = queryWeight, product of:
               1.7407855 = boost
               6.0585327 = idf(docFreq=280, maxDocs=44218)
               0.018234773 = queryNorm
             0.47332287 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.0585327 = idf(docFreq=280, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.061159518 = weight(abstract_txt:relevant in 900) [ClassicSimilarity], result of:
           0.061159518 = score(doc=900,freq=1.0), product of:
             0.16887777 = queryWeight, product of:
               1.9978855 = boost
               4.635553 = idf(docFreq=1165, maxDocs=44218)
               0.018234773 = queryNorm
             0.36215258 = fieldWeight in 900, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.635553 = idf(docFreq=1165, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.42680588 = weight(abstract_txt:classifiers in 900) [ClassicSimilarity], result of:
           0.42680588 = score(doc=900,freq=6.0), product of:
             0.2964849 = queryWeight, product of:
               2.1614242 = boost
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.018234773 = queryNorm
             1.4395536 = fieldWeight in 900, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
         0.1737002 = weight(abstract_txt:documents in 900) [ClassicSimilarity], result of:
           0.1737002 = score(doc=900,freq=3.0), product of:
             0.31146926 = queryWeight, product of:
               4.144578 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.018234773 = queryNorm
             0.5576801 = fieldWeight in 900, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.078125 = fieldNorm(doc=900)
       0.32 = coord(8/25)
   

3. Ringltetter, C.; Stubbe, A.: Practical aspects of automatic genre classification (2008) 0.22

   0.21582945 = sum of:
     0.21582945 = product of:
       0.89928937 = sum of:
         0.020084796 = weight(abstract_txt:most in 1954) [ClassicSimilarity], result of:
           0.020084796 = score(doc=1954,freq=1.0), product of:
             0.08148625 = queryWeight, product of:
               1.1331329 = boost
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.018234773 = queryNorm
             0.24648081 = fieldWeight in 1954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
         0.03608402 = weight(abstract_txt:classification in 1954) [ClassicSimilarity], result of:
           0.03608402 = score(doc=1954,freq=3.0), product of:
             0.083497904 = queryWeight, product of:
               1.1470345 = boost
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.018234773 = queryNorm
             0.4321548 = fieldWeight in 1954, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
         0.042480532 = weight(abstract_txt:topic in 1954) [ClassicSimilarity], result of:
           0.042480532 = score(doc=1954,freq=1.0), product of:
             0.13426599 = queryWeight, product of:
               1.4545268 = boost
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.018234773 = queryNorm
             0.31639087 = fieldWeight in 1954, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
         0.064950086 = weight(abstract_txt:automatic in 1954) [ClassicSimilarity], result of:
           0.064950086 = score(doc=1954,freq=2.0), product of:
             0.1414325 = queryWeight, product of:
               1.4928402 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.018234773 = queryNorm
             0.45923027 = fieldWeight in 1954, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
         0.19651936 = weight(abstract_txt:documents in 1954) [ClassicSimilarity], result of:
           0.19651936 = score(doc=1954,freq=6.0), product of:
             0.31146926 = queryWeight, product of:
               4.144578 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.018234773 = queryNorm
             0.63094306 = fieldWeight in 1954, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
         0.53917056 = weight(abstract_txt:genre in 1954) [ClassicSimilarity], result of:
           0.53917056 = score(doc=1954,freq=5.0), product of:
             0.5798471 = queryWeight, product of:
               4.779313 = boost
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.018234773 = queryNorm
             0.92984957 = fieldWeight in 1954, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               6.653462 = idf(docFreq=154, maxDocs=44218)
               0.0625 = fieldNorm(doc=1954)
       0.24 = coord(6/25)
   

4. Yang, P.; Gao, W.; Tan, Q.; Wong, K.-F.: ¬A link-bridged topic model for cross-domain document classification (2013) 0.21

   0.20747256 = sum of:
     0.20747256 = product of:
       0.57631266 = sum of:
         0.022807278 = weight(abstract_txt:different in 2706) [ClassicSimilarity], result of:
           0.022807278 = score(doc=2706,freq=2.0), product of:
             0.07039552 = queryWeight, product of:
               1.053201 = boost
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.018234773 = queryNorm
             0.32398763 = fieldWeight in 2706, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6655018 = idf(docFreq=3075, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.07056939 = weight(abstract_txt:labeled in 2706) [ClassicSimilarity], result of:
           0.07056939 = score(doc=2706,freq=1.0), product of:
             0.14947674 = queryWeight, product of:
               1.0852019 = boost
               7.5537524 = idf(docFreq=62, maxDocs=44218)
               0.018234773 = queryNorm
             0.47210953 = fieldWeight in 2706, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5537524 = idf(docFreq=62, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.020084796 = weight(abstract_txt:most in 2706) [ClassicSimilarity], result of:
           0.020084796 = score(doc=2706,freq=1.0), product of:
             0.08148625 = queryWeight, product of:
               1.1331329 = boost
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.018234773 = queryNorm
             0.24648081 = fieldWeight in 2706, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.03608402 = weight(abstract_txt:classification in 2706) [ClassicSimilarity], result of:
           0.03608402 = score(doc=2706,freq=3.0), product of:
             0.083497904 = queryWeight, product of:
               1.1470345 = boost
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.018234773 = queryNorm
             0.4321548 = fieldWeight in 2706, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.035113852 = weight(abstract_txt:learning in 2706) [ClassicSimilarity], result of:
           0.035113852 = score(doc=2706,freq=1.0), product of:
             0.1182565 = queryWeight, product of:
               1.3650584 = boost
               4.750873 = idf(docFreq=1038, maxDocs=44218)
               0.018234773 = queryNorm
             0.29692957 = fieldWeight in 2706, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.750873 = idf(docFreq=1038, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.07357844 = weight(abstract_txt:topic in 2706) [ClassicSimilarity], result of:
           0.07357844 = score(doc=2706,freq=3.0), product of:
             0.13426599 = queryWeight, product of:
               1.4545268 = boost
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.018234773 = queryNorm
             0.54800504 = fieldWeight in 2706, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.062254 = idf(docFreq=760, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.043361705 = weight(abstract_txt:across in 2706) [ClassicSimilarity], result of:
           0.043361705 = score(doc=2706,freq=1.0), product of:
             0.13611634 = queryWeight, product of:
               1.4645151 = boost
               5.097017 = idf(docFreq=734, maxDocs=44218)
               0.018234773 = queryNorm
             0.31856355 = fieldWeight in 2706, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.097017 = idf(docFreq=734, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.11425581 = weight(abstract_txt:transfer in 2706) [ClassicSimilarity], result of:
           0.11425581 = score(doc=2706,freq=2.0), product of:
             0.2061017 = queryWeight, product of:
               1.8021026 = boost
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.018234773 = queryNorm
             0.5543662 = fieldWeight in 2706, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.2719374 = idf(docFreq=226, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
         0.16045739 = weight(abstract_txt:documents in 2706) [ClassicSimilarity], result of:
           0.16045739 = score(doc=2706,freq=4.0), product of:
             0.31146926 = queryWeight, product of:
               4.144578 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.018234773 = queryNorm
             0.5151628 = fieldWeight in 2706, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=2706)
       0.36 = coord(9/25)
   

5. Hung, C.-M.; Chien, L.-F.: Web-based text classification in the absence of manually labeled training documents (2007) 0.19

   0.18669668 = sum of:
     0.18669668 = product of:
       0.66677386 = sum of:
         0.020458125 = weight(abstract_txt:user in 87) [ClassicSimilarity], result of:
           0.020458125 = score(doc=87,freq=1.0), product of:
             0.07109023 = queryWeight, product of:
               1.058385 = boost
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.018234773 = queryNorm
             0.2877769 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6835442 = idf(docFreq=3020, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.15278721 = weight(abstract_txt:labeled in 87) [ClassicSimilarity], result of:
           0.15278721 = score(doc=87,freq=3.0), product of:
             0.14947674 = queryWeight, product of:
               1.0852019 = boost
               7.5537524 = idf(docFreq=62, maxDocs=44218)
               0.018234773 = queryNorm
             1.022147 = fieldWeight in 87, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.5537524 = idf(docFreq=62, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.025105994 = weight(abstract_txt:most in 87) [ClassicSimilarity], result of:
           0.025105994 = score(doc=87,freq=1.0), product of:
             0.08148625 = queryWeight, product of:
               1.1331329 = boost
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.018234773 = queryNorm
             0.308101 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.943693 = idf(docFreq=2328, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.0260414 = weight(abstract_txt:classification in 87) [ClassicSimilarity], result of:
           0.0260414 = score(doc=87,freq=1.0), product of:
             0.083497904 = queryWeight, product of:
               1.1470345 = boost
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.018234773 = queryNorm
             0.3118809 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9920752 = idf(docFreq=2218, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.043892317 = weight(abstract_txt:learning in 87) [ClassicSimilarity], result of:
           0.043892317 = score(doc=87,freq=1.0), product of:
             0.1182565 = queryWeight, product of:
               1.3650584 = boost
               4.750873 = idf(docFreq=1038, maxDocs=44218)
               0.018234773 = queryNorm
             0.37116197 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.750873 = idf(docFreq=1038, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.17424278 = weight(abstract_txt:classifiers in 87) [ClassicSimilarity], result of:
           0.17424278 = score(doc=87,freq=1.0), product of:
             0.2964849 = queryWeight, product of:
               2.1614242 = boost
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.018234773 = queryNorm
             0.5876953 = fieldWeight in 87, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.5225 = idf(docFreq=64, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
         0.22424603 = weight(abstract_txt:documents in 87) [ClassicSimilarity], result of:
           0.22424603 = score(doc=87,freq=5.0), product of:
             0.31146926 = queryWeight, product of:
               4.144578 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.018234773 = queryNorm
             0.719962 = fieldWeight in 87, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.078125 = fieldNorm(doc=87)
       0.28 = coord(7/25)