Document (#9145)

Author

Bookstein, A.
Swanson, D.R.

Title

¬A decision theoretic foundation for indexing

Source

Journal of the American Society for Information Science. 26(1975), S.45-50

Year

1975

Abstract

The indexing of a document is among the most crucial steps in preparing that document for retrieval. The adequacy of the indexing determines the ability of the system to respond to patron requests. This paper discusses this process, and document retrieval in general, on the basis of formal decision theory. The basic theoretical approach taken is illustrated by means of a model of word occurrences in documents in the context of a model information system; both models are fully defined in this paper. Through the main purpose of this papers is to provide insights into a very complex process, formulae are developed that may prove to be of value for an automated operating system. The paper concludes with an interpretation of recall and precision curves as seen from the point of view of decision theory

Similar documents (author)

1. Bookstein, A.; Swanson, D.R.: Probabilistic models for automatic indexing (1974) 5.96

   5.9631186 = sum of:
     5.9631186 = sum of:
       2.840742 = weight(author_txt:swanson in 5465) [ClassicSimilarity], result of:
         2.840742 = score(doc=5465,freq=1.0), product of:
           0.6844939 = queryWeight, product of:
             8.30027 = idf(docFreq=29, maxDocs=44421)
             0.08246646 = queryNorm
           4.150135 = fieldWeight in 5465, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.30027 = idf(docFreq=29, maxDocs=44421)
             0.5 = fieldNorm(doc=5465)
       3.1223767 = weight(author_txt:bookstein in 5465) [ClassicSimilarity], result of:
         3.1223767 = score(doc=5465,freq=1.0), product of:
           0.72901857 = queryWeight, product of:
             1.0320114 = boost
             8.565973 = idf(docFreq=22, maxDocs=44421)
             0.08246646 = queryNorm
           4.2829866 = fieldWeight in 5465, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.565973 = idf(docFreq=22, maxDocs=44421)
             0.5 = fieldNorm(doc=5465)
   

2. Swanson, D.R.; Smalheiser, N.R.; Bookstein, A.: Information discovery from complementary literatures : categorizing viruses as potential weapons (2001) 4.47

   4.472339 = sum of:
     4.472339 = sum of:
       2.1305566 = weight(author_txt:swanson in 513) [ClassicSimilarity], result of:
         2.1305566 = score(doc=513,freq=1.0), product of:
           0.6844939 = queryWeight, product of:
             8.30027 = idf(docFreq=29, maxDocs=44421)
             0.08246646 = queryNorm
           3.1126013 = fieldWeight in 513, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.30027 = idf(docFreq=29, maxDocs=44421)
             0.375 = fieldNorm(doc=513)
       2.3417826 = weight(author_txt:bookstein in 513) [ClassicSimilarity], result of:
         2.3417826 = score(doc=513,freq=1.0), product of:
           0.72901857 = queryWeight, product of:
             1.0320114 = boost
             8.565973 = idf(docFreq=22, maxDocs=44421)
             0.08246646 = queryNorm
           3.21224 = fieldWeight in 513, product of:
             1.0 = tf(freq=1.0), with freq of:
               1.0 = termFreq=1.0
             8.565973 = idf(docFreq=22, maxDocs=44421)
             0.375 = fieldNorm(doc=513)
   

3. Bookstein, A.: Probability and Fuzzy-set applications to information retrieval (1985) 1.95

   1.9514854 = sum of:
     1.9514854 = product of:
       3.9029708 = sum of:
         3.9029708 = weight(author_txt:bookstein in 780) [ClassicSimilarity], result of:
           3.9029708 = score(doc=780,freq=1.0), product of:
             0.72901857 = queryWeight, product of:
               1.0320114 = boost
               8.565973 = idf(docFreq=22, maxDocs=44421)
               0.08246646 = queryNorm
             5.353733 = fieldWeight in 780, 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=780)
       0.5 = coord(1/2)
   

4. Bookstein, A.: Relevance (1979) 1.95

   1.9514854 = sum of:
     1.9514854 = product of:
       3.9029708 = sum of:
         3.9029708 = weight(author_txt:bookstein in 838) [ClassicSimilarity], result of:
           3.9029708 = score(doc=838,freq=1.0), product of:
             0.72901857 = queryWeight, product of:
               1.0320114 = boost
               8.565973 = idf(docFreq=22, maxDocs=44421)
               0.08246646 = queryNorm
             5.353733 = fieldWeight in 838, 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=838)
       0.5 = coord(1/2)
   

5. Bookstein, A.: Fuzzy requests : an approach to weighted Boolean searches (1979) 1.95

   1.9514854 = sum of:
     1.9514854 = product of:
       3.9029708 = sum of:
         3.9029708 = weight(author_txt:bookstein in 5503) [ClassicSimilarity], result of:
           3.9029708 = score(doc=5503,freq=1.0), product of:
             0.72901857 = queryWeight, product of:
               1.0320114 = boost
               8.565973 = idf(docFreq=22, maxDocs=44421)
               0.08246646 = queryNorm
             5.353733 = fieldWeight in 5503, 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=5503)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Cooper, W.S.: Indexing documents by Gedanken experimentation (1978) 0.23

   0.2337268 = sum of:
     0.2337268 = product of:
       0.83473855 = sum of:
         0.025181133 = weight(abstract_txt:retrieval in 411) [ClassicSimilarity], result of:
           0.025181133 = score(doc=411,freq=1.0), product of:
             0.092713505 = queryWeight, product of:
               1.1250798 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.023703773 = queryNorm
             0.27160156 = fieldWeight in 411, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.06890131 = weight(abstract_txt:process in 411) [ClassicSimilarity], result of:
           0.06890131 = score(doc=411,freq=3.0), product of:
             0.12575851 = queryWeight, product of:
               1.3103294 = boost
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.023703773 = queryNorm
             0.54788584 = fieldWeight in 411, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.07877778 = weight(abstract_txt:theory in 411) [ClassicSimilarity], result of:
           0.07877778 = score(doc=411,freq=2.0), product of:
             0.15740506 = queryWeight, product of:
               1.4659567 = boost
               4.529811 = idf(docFreq=1301, maxDocs=44421)
               0.023703773 = queryNorm
             0.5004781 = fieldWeight in 411, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.529811 = idf(docFreq=1301, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.016699078 = weight(abstract_txt:this in 411) [ClassicSimilarity], result of:
           0.016699078 = score(doc=411,freq=1.0), product of:
             0.088830985 = queryWeight, product of:
               1.5574318 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.023703773 = queryNorm
             0.18798709 = fieldWeight in 411, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.0711822 = weight(abstract_txt:document in 411) [ClassicSimilarity], result of:
           0.0711822 = score(doc=411,freq=1.0), product of:
             0.21217987 = queryWeight, product of:
               2.0845366 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.023703773 = queryNorm
             0.33548045 = fieldWeight in 411, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.22203504 = weight(abstract_txt:indexing in 411) [ClassicSimilarity], result of:
           0.22203504 = score(doc=411,freq=9.0), product of:
             0.21776602 = queryWeight, product of:
               2.1117985 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.023703773 = queryNorm
             1.0196037 = fieldWeight in 411, product of:
               3.0 = tf(freq=9.0), with freq of:
                 9.0 = termFreq=9.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
         0.35196203 = weight(abstract_txt:decision in 411) [ClassicSimilarity], result of:
           0.35196203 = score(doc=411,freq=5.0), product of:
             0.3601337 = queryWeight, product of:
               2.715747 = boost
               5.5944448 = idf(docFreq=448, maxDocs=44421)
               0.023703773 = queryNorm
             0.9773093 = fieldWeight in 411, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               5.5944448 = idf(docFreq=448, maxDocs=44421)
               0.078125 = fieldNorm(doc=411)
       0.28 = coord(7/25)
   

2. Wang, P.; Soergel, D.: ¬A cognitive model of document use during a research project : Study I: Document selection (1998) 0.22

   0.21944109 = sum of:
     0.21944109 = product of:
       0.6857534 = sum of:
         0.020144906 = weight(abstract_txt:retrieval in 1443) [ClassicSimilarity], result of:
           0.020144906 = score(doc=1443,freq=1.0), product of:
             0.092713505 = queryWeight, product of:
               1.1250798 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.023703773 = queryNorm
             0.21728125 = fieldWeight in 1443, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.11795946 = weight(abstract_txt:theoretic in 1443) [ClassicSimilarity], result of:
           0.11795946 = score(doc=1443,freq=1.0), product of:
             0.23906244 = queryWeight, product of:
               1.2774752 = boost
               7.894805 = idf(docFreq=44, maxDocs=44421)
               0.023703773 = queryNorm
             0.4934253 = fieldWeight in 1443, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.894805 = idf(docFreq=44, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.06057985 = weight(abstract_txt:model in 1443) [ClassicSimilarity], result of:
           0.06057985 = score(doc=1443,freq=4.0), product of:
             0.121683486 = queryWeight, product of:
               1.2889249 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.023703773 = queryNorm
             0.49784777 = fieldWeight in 1443, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.045006145 = weight(abstract_txt:process in 1443) [ClassicSimilarity], result of:
           0.045006145 = score(doc=1443,freq=2.0), product of:
             0.12575851 = queryWeight, product of:
               1.3103294 = boost
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.023703773 = queryNorm
             0.35787752 = fieldWeight in 1443, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.023138922 = weight(abstract_txt:this in 1443) [ClassicSimilarity], result of:
           0.023138922 = score(doc=1443,freq=3.0), product of:
             0.088830985 = queryWeight, product of:
               1.5574318 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.023703773 = queryNorm
             0.26048255 = fieldWeight in 1443, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.027592557 = weight(abstract_txt:system in 1443) [ClassicSimilarity], result of:
           0.027592557 = score(doc=1443,freq=1.0), product of:
             0.13089545 = queryWeight, product of:
               1.6372677 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.023703773 = queryNorm
             0.21079844 = fieldWeight in 1443, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.13948806 = weight(abstract_txt:document in 1443) [ClassicSimilarity], result of:
           0.13948806 = score(doc=1443,freq=6.0), product of:
             0.21217987 = queryWeight, product of:
               2.0845366 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.023703773 = queryNorm
             0.6574048 = fieldWeight in 1443, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
         0.2518435 = weight(abstract_txt:decision in 1443) [ClassicSimilarity], result of:
           0.2518435 = score(doc=1443,freq=4.0), product of:
             0.3601337 = queryWeight, product of:
               2.715747 = boost
               5.5944448 = idf(docFreq=448, maxDocs=44421)
               0.023703773 = queryNorm
             0.6993056 = fieldWeight in 1443, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5944448 = idf(docFreq=448, maxDocs=44421)
               0.0625 = fieldNorm(doc=1443)
       0.32 = coord(8/25)
   

3. Lee, C.; Lee, G.G.: Probabilistic information retrieval model for a dependence structured indexing system (2005) 0.18

   0.18362112 = sum of:
     0.18362112 = product of:
       0.51005864 = sum of:
         0.0356115 = weight(abstract_txt:retrieval in 2004) [ClassicSimilarity], result of:
           0.0356115 = score(doc=2004,freq=2.0), product of:
             0.092713505 = queryWeight, product of:
               1.1250798 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.023703773 = queryNorm
             0.3841026 = fieldWeight in 2004, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.14744933 = weight(abstract_txt:theoretic in 2004) [ClassicSimilarity], result of:
           0.14744933 = score(doc=2004,freq=1.0), product of:
             0.23906244 = queryWeight, product of:
               1.2774752 = boost
               7.894805 = idf(docFreq=44, maxDocs=44421)
               0.023703773 = queryNorm
             0.61678165 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.894805 = idf(docFreq=44, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.053545527 = weight(abstract_txt:model in 2004) [ClassicSimilarity], result of:
           0.053545527 = score(doc=2004,freq=2.0), product of:
             0.121683486 = queryWeight, product of:
               1.2889249 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.023703773 = queryNorm
             0.4400394 = fieldWeight in 2004, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.03978019 = weight(abstract_txt:process in 2004) [ClassicSimilarity], result of:
           0.03978019 = score(doc=2004,freq=1.0), product of:
             0.12575851 = queryWeight, product of:
               1.3103294 = boost
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.023703773 = queryNorm
             0.31632203 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.016699078 = weight(abstract_txt:this in 2004) [ClassicSimilarity], result of:
           0.016699078 = score(doc=2004,freq=1.0), product of:
             0.088830985 = queryWeight, product of:
               1.5574318 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.023703773 = queryNorm
             0.18798709 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.034490697 = weight(abstract_txt:system in 2004) [ClassicSimilarity], result of:
           0.034490697 = score(doc=2004,freq=1.0), product of:
             0.13089545 = queryWeight, product of:
               1.6372677 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.023703773 = queryNorm
             0.26349807 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.037288453 = weight(abstract_txt:paper in 2004) [ClassicSimilarity], result of:
           0.037288453 = score(doc=2004,freq=1.0), product of:
             0.13788155 = queryWeight, product of:
               1.6803916 = boost
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.023703773 = queryNorm
             0.2704383 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.0711822 = weight(abstract_txt:document in 2004) [ClassicSimilarity], result of:
           0.0711822 = score(doc=2004,freq=1.0), product of:
             0.21217987 = queryWeight, product of:
               2.0845366 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.023703773 = queryNorm
             0.33548045 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
         0.07401168 = weight(abstract_txt:indexing in 2004) [ClassicSimilarity], result of:
           0.07401168 = score(doc=2004,freq=1.0), product of:
             0.21776602 = queryWeight, product of:
               2.1117985 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.023703773 = queryNorm
             0.33986792 = fieldWeight in 2004, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.078125 = fieldNorm(doc=2004)
       0.36 = coord(9/25)
   

4. Sembok, T.M.T.; Rijsbergen, C.J. van: SILOL: a simple logical-linguistic document retrieval system (1990) 0.17

   0.17373419 = sum of:
     0.17373419 = product of:
       0.54291934 = sum of:
         0.06756807 = weight(abstract_txt:retrieval in 6683) [ClassicSimilarity], result of:
           0.06756807 = score(doc=6683,freq=5.0), product of:
             0.092713505 = queryWeight, product of:
               1.1250798 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.023703773 = queryNorm
             0.7287835 = fieldWeight in 6683, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.04543489 = weight(abstract_txt:model in 6683) [ClassicSimilarity], result of:
           0.04543489 = score(doc=6683,freq=1.0), product of:
             0.121683486 = queryWeight, product of:
               1.2889249 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.023703773 = queryNorm
             0.37338582 = fieldWeight in 6683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.047736228 = weight(abstract_txt:process in 6683) [ClassicSimilarity], result of:
           0.047736228 = score(doc=6683,freq=1.0), product of:
             0.12575851 = queryWeight, product of:
               1.3103294 = boost
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.023703773 = queryNorm
             0.37958646 = fieldWeight in 6683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.06684517 = weight(abstract_txt:theory in 6683) [ClassicSimilarity], result of:
           0.06684517 = score(doc=6683,freq=1.0), product of:
             0.15740506 = queryWeight, product of:
               1.4659567 = boost
               4.529811 = idf(docFreq=1301, maxDocs=44421)
               0.023703773 = queryNorm
             0.42466977 = fieldWeight in 6683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.529811 = idf(docFreq=1301, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.020038893 = weight(abstract_txt:this in 6683) [ClassicSimilarity], result of:
           0.020038893 = score(doc=6683,freq=1.0), product of:
             0.088830985 = queryWeight, product of:
               1.5574318 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.023703773 = queryNorm
             0.2255845 = fieldWeight in 6683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.05853265 = weight(abstract_txt:system in 6683) [ClassicSimilarity], result of:
           0.05853265 = score(doc=6683,freq=2.0), product of:
             0.13089545 = queryWeight, product of:
               1.6372677 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.023703773 = queryNorm
             0.447171 = fieldWeight in 6683, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.14794943 = weight(abstract_txt:document in 6683) [ClassicSimilarity], result of:
           0.14794943 = score(doc=6683,freq=3.0), product of:
             0.21217987 = queryWeight, product of:
               2.0845366 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.023703773 = queryNorm
             0.697283 = fieldWeight in 6683, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
         0.08881402 = weight(abstract_txt:indexing in 6683) [ClassicSimilarity], result of:
           0.08881402 = score(doc=6683,freq=1.0), product of:
             0.21776602 = queryWeight, product of:
               2.1117985 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.023703773 = queryNorm
             0.4078415 = fieldWeight in 6683, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.09375 = fieldNorm(doc=6683)
       0.32 = coord(8/25)
   

5. Chen, L.; Zeng, J.; Tokuda, N.: ¬A "stereo" document representation for textual information retrieval (2006) 0.14

   0.14265192 = sum of:
     0.14265192 = product of:
       0.5094711 = sum of:
         0.08948795 = weight(abstract_txt:illustrated in 292) [ClassicSimilarity], result of:
           0.08948795 = score(doc=292,freq=1.0), product of:
             0.17136647 = queryWeight, product of:
               1.0815827 = boost
               6.684188 = idf(docFreq=150, maxDocs=44421)
               0.023703773 = queryNorm
             0.5222022 = fieldWeight in 292, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.684188 = idf(docFreq=150, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.0356115 = weight(abstract_txt:retrieval in 292) [ClassicSimilarity], result of:
           0.0356115 = score(doc=292,freq=2.0), product of:
             0.092713505 = queryWeight, product of:
               1.1250798 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.023703773 = queryNorm
             0.3841026 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.107091054 = weight(abstract_txt:model in 292) [ClassicSimilarity], result of:
           0.107091054 = score(doc=292,freq=8.0), product of:
             0.121683486 = queryWeight, product of:
               1.2889249 = boost
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.023703773 = queryNorm
             0.8800788 = fieldWeight in 292, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               3.9827821 = idf(docFreq=2249, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.023616062 = weight(abstract_txt:this in 292) [ClassicSimilarity], result of:
           0.023616062 = score(doc=292,freq=2.0), product of:
             0.088830985 = queryWeight, product of:
               1.5574318 = boost
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.023703773 = queryNorm
             0.26585388 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.4062347 = idf(docFreq=10885, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.037288453 = weight(abstract_txt:paper in 292) [ClassicSimilarity], result of:
           0.037288453 = score(doc=292,freq=1.0), product of:
             0.13788155 = queryWeight, product of:
               1.6803916 = boost
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.023703773 = queryNorm
             0.2704383 = fieldWeight in 292, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4616103 = idf(docFreq=3788, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.1423644 = weight(abstract_txt:document in 292) [ClassicSimilarity], result of:
           0.1423644 = score(doc=292,freq=4.0), product of:
             0.21217987 = queryWeight, product of:
               2.0845366 = boost
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.023703773 = queryNorm
             0.6709609 = fieldWeight in 292, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.29415 = idf(docFreq=1647, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
         0.07401168 = weight(abstract_txt:indexing in 292) [ClassicSimilarity], result of:
           0.07401168 = score(doc=292,freq=1.0), product of:
             0.21776602 = queryWeight, product of:
               2.1117985 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.023703773 = queryNorm
             0.33986792 = fieldWeight in 292, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.078125 = fieldNorm(doc=292)
       0.28 = coord(7/25)