Document (#41006)

Author

Lu, K.
Mao, J.

Title

¬An automatic approach to weighted subject indexing : an empirical study in the biomedical domain

Source

Journal of the Association for Information Science and Technology. 66(2015) no.9, S.1776-1784

Year

2015

Abstract

Subject indexing is an intellectually intensive process that has many inherent uncertainties. Existing manual subject indexing systems generally produce binary outcomes for whether or not to assign an indexing term. This does not sufficiently reflect the extent to which the indexing terms are associated with the documents. On the other hand, the idea of probabilistic or weighted indexing was proposed a long time ago and has seen success in capturing uncertainties in the automatic indexing process. One hurdle to overcome in implementing weighted indexing in manual subject indexing systems is the practical burden that could be added to the already intensive indexing process. This study proposes a method to infer automatically the associations between subject terms and documents through text mining. By uncovering the connections between MeSH descriptors and document text, we are able to derive the weights of MeSH descriptors manually assigned to documents. Our initial results suggest that the inference method is feasible and promising. The study has practical implications for improving subject indexing practice and providing better support for information retrieval.

Content

Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23290/abstract.

Theme

Indexierungsstudien
Automatisches Indexieren

Field

Medizin

Object

MeSH

Similar documents (content)

1. Lu, K.; Mao, J.; Li, G.: Toward effective automated weighted subject indexing : a comparison of different approaches in different environments (2018) 0.35

   0.34792557 = sum of:
     0.34792557 = product of:
       0.9664599 = sum of:
         0.07950346 = weight(abstract_txt:weights in 292) [ClassicSimilarity], result of:
           0.07950346 = score(doc=292,freq=2.0), product of:
             0.12411537 = queryWeight, product of:
               7.2471204 = idf(docFreq=85, maxDocs=44421)
               0.017126163 = queryNorm
             0.640561 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.2471204 = idf(docFreq=85, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.027564375 = weight(abstract_txt:text in 292) [ClassicSimilarity], result of:
           0.027564375 = score(doc=292,freq=2.0), product of:
             0.07717506 = queryWeight, product of:
               1.115169 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.017126163 = queryNorm
             0.3571669 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.04658619 = weight(abstract_txt:method in 292) [ClassicSimilarity], result of:
           0.04658619 = score(doc=292,freq=3.0), product of:
             0.09565754 = queryWeight, product of:
               1.2415432 = boost
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.017126163 = queryNorm
             0.4870101 = fieldWeight in 292, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.030570617 = weight(abstract_txt:study in 292) [ClassicSimilarity], result of:
           0.030570617 = score(doc=292,freq=3.0), product of:
             0.08268899 = queryWeight, product of:
               1.413747 = boost
               3.415198 = idf(docFreq=3968, maxDocs=44421)
               0.017126163 = queryNorm
             0.36970603 = fieldWeight in 292, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.415198 = idf(docFreq=3968, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.03106259 = weight(abstract_txt:documents in 292) [ClassicSimilarity], result of:
           0.03106259 = score(doc=292,freq=1.0), product of:
             0.12053423 = queryWeight, product of:
               1.7068802 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017126163 = queryNorm
             0.25770763 = fieldWeight in 292, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.123658866 = weight(abstract_txt:descriptors in 292) [ClassicSimilarity], result of:
           0.123658866 = score(doc=292,freq=2.0), product of:
             0.20992382 = queryWeight, product of:
               1.8392174 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.017126163 = queryNorm
             0.58906543 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.21016833 = weight(abstract_txt:weighted in 292) [ClassicSimilarity], result of:
           0.21016833 = score(doc=292,freq=2.0), product of:
             0.34223163 = queryWeight, product of:
               2.876126 = boost
               6.9478774 = idf(docFreq=115, maxDocs=44421)
               0.017126163 = queryNorm
             0.61411136 = fieldWeight in 292, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.9478774 = idf(docFreq=115, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.14982447 = weight(abstract_txt:subject in 292) [ClassicSimilarity], result of:
           0.14982447 = score(doc=292,freq=8.0), product of:
             0.21676399 = queryWeight, product of:
               3.2371023 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.017126163 = queryNorm
             0.6911871 = fieldWeight in 292, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
         0.2675209 = weight(abstract_txt:indexing in 292) [ClassicSimilarity], result of:
           0.2675209 = score(doc=292,freq=4.0), product of:
             0.4919575 = queryWeight, product of:
               6.6030917 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.017126163 = queryNorm
             0.5437887 = fieldWeight in 292, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.0625 = fieldNorm(doc=292)
       0.36 = coord(9/25)
   

2. Willis, C.; Losee, R.M.: ¬A random walk on an ontology : using thesaurus structure for automatic subject indexing (2013) 0.34

   0.33683974 = sum of:
     0.33683974 = product of:
       0.9356659 = sum of:
         0.024169534 = weight(abstract_txt:terms in 2016) [ClassicSimilarity], result of:
           0.024169534 = score(doc=2016,freq=2.0), product of:
             0.07728319 = queryWeight, product of:
               1.11595 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.017126163 = queryNorm
             0.31273988 = fieldWeight in 2016, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.051269107 = weight(abstract_txt:automatic in 2016) [ClassicSimilarity], result of:
           0.051269107 = score(doc=2016,freq=2.0), product of:
             0.12758805 = queryWeight, product of:
               1.4338615 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.017126163 = queryNorm
             0.40183315 = fieldWeight in 2016, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.05459035 = weight(abstract_txt:manual in 2016) [ClassicSimilarity], result of:
           0.05459035 = score(doc=2016,freq=1.0), product of:
             0.16762035 = queryWeight, product of:
               1.6434844 = boost
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.017126163 = queryNorm
             0.32567853 = fieldWeight in 2016, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.051469766 = weight(abstract_txt:process in 2016) [ClassicSimilarity], result of:
           0.051469766 = score(doc=2016,freq=4.0), product of:
             0.1162237 = queryWeight, product of:
               1.6760818 = boost
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.017126163 = queryNorm
             0.44285086 = fieldWeight in 2016, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.048922 = idf(docFreq=2105, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.038437992 = weight(abstract_txt:documents in 2016) [ClassicSimilarity], result of:
           0.038437992 = score(doc=2016,freq=2.0), product of:
             0.12053423 = queryWeight, product of:
               1.7068802 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017126163 = queryNorm
             0.31889692 = fieldWeight in 2016, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.14189224 = weight(abstract_txt:mesh in 2016) [ClassicSimilarity], result of:
           0.14189224 = score(doc=2016,freq=2.0), product of:
             0.2515042 = queryWeight, product of:
               2.013144 = boost
               7.2947483 = idf(docFreq=81, maxDocs=44421)
               0.017126163 = queryNorm
             0.5641744 = fieldWeight in 2016, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.2947483 = idf(docFreq=81, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.18389729 = weight(abstract_txt:weighted in 2016) [ClassicSimilarity], result of:
           0.18389729 = score(doc=2016,freq=2.0), product of:
             0.34223163 = queryWeight, product of:
               2.876126 = boost
               6.9478774 = idf(docFreq=115, maxDocs=44421)
               0.017126163 = queryNorm
             0.53734744 = fieldWeight in 2016, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.9478774 = idf(docFreq=115, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.08027983 = weight(abstract_txt:subject in 2016) [ClassicSimilarity], result of:
           0.08027983 = score(doc=2016,freq=3.0), product of:
             0.21676399 = queryWeight, product of:
               3.2371023 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.017126163 = queryNorm
             0.37035593 = fieldWeight in 2016, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
         0.30965978 = weight(abstract_txt:indexing in 2016) [ClassicSimilarity], result of:
           0.30965978 = score(doc=2016,freq=7.0), product of:
             0.4919575 = queryWeight, product of:
               6.6030917 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.017126163 = queryNorm
             0.6294442 = fieldWeight in 2016, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2016)
       0.36 = coord(9/25)
   

3. Humphrey, S.M.; Névéol, A.; Browne, A.; Gobeil, J.; Ruch, P.; Darmoni, S.J.: Comparing a rule-based versus statistical system for automatic categorization of MEDLINE documents according to biomedical specialty (2009) 0.30

   0.30328214 = sum of:
     0.30328214 = product of:
       0.8424504 = sum of:
         0.057622913 = weight(abstract_txt:assign in 287) [ClassicSimilarity], result of:
           0.057622913 = score(doc=287,freq=1.0), product of:
             0.1261755 = queryWeight, product of:
               1.008265 = boost
               7.3070183 = idf(docFreq=80, maxDocs=44421)
               0.017126163 = queryNorm
             0.45668864 = fieldWeight in 287, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3070183 = idf(docFreq=80, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.019531935 = weight(abstract_txt:terms in 287) [ClassicSimilarity], result of:
           0.019531935 = score(doc=287,freq=1.0), product of:
             0.07728319 = queryWeight, product of:
               1.11595 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.017126163 = queryNorm
             0.252732 = fieldWeight in 287, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.038037464 = weight(abstract_txt:method in 287) [ClassicSimilarity], result of:
           0.038037464 = score(doc=287,freq=2.0), product of:
             0.09565754 = queryWeight, product of:
               1.2415432 = boost
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.017126163 = queryNorm
             0.39764208 = fieldWeight in 287, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.058593266 = weight(abstract_txt:automatic in 287) [ClassicSimilarity], result of:
           0.058593266 = score(doc=287,freq=2.0), product of:
             0.12758805 = queryWeight, product of:
               1.4338615 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.017126163 = queryNorm
             0.45923787 = fieldWeight in 287, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.06212518 = weight(abstract_txt:documents in 287) [ClassicSimilarity], result of:
           0.06212518 = score(doc=287,freq=4.0), product of:
             0.12053423 = queryWeight, product of:
               1.7068802 = boost
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.017126163 = queryNorm
             0.51541525 = fieldWeight in 287, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.123322 = idf(docFreq=1954, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.08744003 = weight(abstract_txt:descriptors in 287) [ClassicSimilarity], result of:
           0.08744003 = score(doc=287,freq=1.0), product of:
             0.20992382 = queryWeight, product of:
               1.8392174 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.017126163 = queryNorm
             0.4165322 = fieldWeight in 287, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.19860776 = weight(abstract_txt:mesh in 287) [ClassicSimilarity], result of:
           0.19860776 = score(doc=287,freq=3.0), product of:
             0.2515042 = queryWeight, product of:
               2.013144 = boost
               7.2947483 = idf(docFreq=81, maxDocs=44421)
               0.017126163 = queryNorm
             0.78967965 = fieldWeight in 287, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.2947483 = idf(docFreq=81, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.05297095 = weight(abstract_txt:subject in 287) [ClassicSimilarity], result of:
           0.05297095 = score(doc=287,freq=1.0), product of:
             0.21676399 = queryWeight, product of:
               3.2371023 = boost
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.017126163 = queryNorm
             0.24437155 = fieldWeight in 287, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9099448 = idf(docFreq=2419, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
         0.2675209 = weight(abstract_txt:indexing in 287) [ClassicSimilarity], result of:
           0.2675209 = score(doc=287,freq=4.0), product of:
             0.4919575 = queryWeight, product of:
               6.6030917 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.017126163 = queryNorm
             0.5437887 = fieldWeight in 287, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.0625 = fieldNorm(doc=287)
       0.36 = coord(9/25)
   

4. Patrick, T.B.; Sievert, M.C.; Popescu, M.: Text indexing of images based on graphical image content (1999) 0.22

   0.2229946 = sum of:
     0.2229946 = product of:
       0.6968581 = sum of:
         0.05621744 = weight(abstract_txt:weights in 680) [ClassicSimilarity], result of:
           0.05621744 = score(doc=680,freq=1.0), product of:
             0.12411537 = queryWeight, product of:
               7.2471204 = idf(docFreq=85, maxDocs=44421)
               0.017126163 = queryNorm
             0.45294502 = fieldWeight in 680, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.2471204 = idf(docFreq=85, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.057622913 = weight(abstract_txt:assign in 680) [ClassicSimilarity], result of:
           0.057622913 = score(doc=680,freq=1.0), product of:
             0.1261755 = queryWeight, product of:
               1.008265 = boost
               7.3070183 = idf(docFreq=80, maxDocs=44421)
               0.017126163 = queryNorm
             0.45668864 = fieldWeight in 680, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3070183 = idf(docFreq=80, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.059787773 = weight(abstract_txt:sufficiently in 680) [ClassicSimilarity], result of:
           0.059787773 = score(doc=680,freq=1.0), product of:
             0.12931626 = queryWeight, product of:
               1.0207368 = boost
               7.3974023 = idf(docFreq=73, maxDocs=44421)
               0.017126163 = queryNorm
             0.46233764 = fieldWeight in 680, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.3974023 = idf(docFreq=73, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.038981915 = weight(abstract_txt:text in 680) [ClassicSimilarity], result of:
           0.038981915 = score(doc=680,freq=4.0), product of:
             0.07717506 = queryWeight, product of:
               1.115169 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.017126163 = queryNorm
             0.50511026 = fieldWeight in 680, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.03906387 = weight(abstract_txt:terms in 680) [ClassicSimilarity], result of:
           0.03906387 = score(doc=680,freq=4.0), product of:
             0.07728319 = queryWeight, product of:
               1.11595 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.017126163 = queryNorm
             0.505464 = fieldWeight in 680, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.06014251 = weight(abstract_txt:method in 680) [ClassicSimilarity], result of:
           0.06014251 = score(doc=680,freq=5.0), product of:
             0.09565754 = queryWeight, product of:
               1.2415432 = boost
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.017126163 = queryNorm
             0.6287273 = fieldWeight in 680, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.4988065 = idf(docFreq=1342, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.08594422 = weight(abstract_txt:intensive in 680) [ClassicSimilarity], result of:
           0.08594422 = score(doc=680,freq=1.0), product of:
             0.20752288 = queryWeight, product of:
               1.8286694 = boost
               6.6262937 = idf(docFreq=159, maxDocs=44421)
               0.017126163 = queryNorm
             0.41414335 = fieldWeight in 680, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.6262937 = idf(docFreq=159, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
         0.29909748 = weight(abstract_txt:indexing in 680) [ClassicSimilarity], result of:
           0.29909748 = score(doc=680,freq=5.0), product of:
             0.4919575 = queryWeight, product of:
               6.6030917 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.017126163 = queryNorm
             0.60797423 = fieldWeight in 680, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.0625 = fieldNorm(doc=680)
       0.32 = coord(8/25)
   

5. Savoy, J.: Bibliographic database access using free-text and controlled vocabulary : an evaluation (2005) 0.20

   0.20262823 = sum of:
     0.20262823 = product of:
       0.7236722 = sum of:
         0.024363697 = weight(abstract_txt:text in 2053) [ClassicSimilarity], result of:
           0.024363697 = score(doc=2053,freq=1.0), product of:
             0.07717506 = queryWeight, product of:
               1.115169 = boost
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.017126163 = queryNorm
             0.3156939 = fieldWeight in 2053, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.040882 = idf(docFreq=2122, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.02441492 = weight(abstract_txt:terms in 2053) [ClassicSimilarity], result of:
           0.02441492 = score(doc=2053,freq=1.0), product of:
             0.07728319 = queryWeight, product of:
               1.11595 = boost
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.017126163 = queryNorm
             0.31591502 = fieldWeight in 2053, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.043712 = idf(docFreq=2116, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.031201003 = weight(abstract_txt:study in 2053) [ClassicSimilarity], result of:
           0.031201003 = score(doc=2053,freq=2.0), product of:
             0.08268899 = queryWeight, product of:
               1.413747 = boost
               3.415198 = idf(docFreq=3968, maxDocs=44421)
               0.017126163 = queryNorm
             0.37732962 = fieldWeight in 2053, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.415198 = idf(docFreq=3968, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.08970225 = weight(abstract_txt:automatic in 2053) [ClassicSimilarity], result of:
           0.08970225 = score(doc=2053,freq=3.0), product of:
             0.12758805 = queryWeight, product of:
               1.4338615 = boost
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.017126163 = queryNorm
             0.7030615 = fieldWeight in 2053, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.1956835 = idf(docFreq=668, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.110289164 = weight(abstract_txt:manual in 2053) [ClassicSimilarity], result of:
           0.110289164 = score(doc=2053,freq=2.0), product of:
             0.16762035 = queryWeight, product of:
               1.6434844 = boost
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.017126163 = queryNorm
             0.65797 = fieldWeight in 2053, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.9552646 = idf(docFreq=312, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.10930003 = weight(abstract_txt:descriptors in 2053) [ClassicSimilarity], result of:
           0.10930003 = score(doc=2053,freq=1.0), product of:
             0.20992382 = queryWeight, product of:
               1.8392174 = boost
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.017126163 = queryNorm
             0.5206652 = fieldWeight in 2053, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.664515 = idf(docFreq=153, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
         0.33440113 = weight(abstract_txt:indexing in 2053) [ClassicSimilarity], result of:
           0.33440113 = score(doc=2053,freq=4.0), product of:
             0.4919575 = queryWeight, product of:
               6.6030917 = boost
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.017126163 = queryNorm
             0.67973584 = fieldWeight in 2053, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.3503094 = idf(docFreq=1557, maxDocs=44421)
               0.078125 = fieldNorm(doc=2053)
       0.28 = coord(7/25)