Document (#35301)

Author

Humphrey, S.M.
Névéol, A.
Browne, A.
Gobeil, J.
Ruch, P.
Darmoni, S.J.

Title

Comparing a rule-based versus statistical system for automatic categorization of MEDLINE documents according to biomedical specialty

Source

Journal of the American Society for Information Science and Technology. 60(2009) no.12, S.2530-2539

Year

2009

Abstract

Automatic document categorization is an important research problem in Information Science and Natural Language Processing. Many applications, including, Word Sense Disambiguation and Information Retrieval in large collections, can benefit from such categorization. This paper focuses on automatic categorization of documents from the biomedical literature into broad discipline-based categories. Two different systems are described and contrasted: CISMeF, which uses rules based on human indexing of the documents by the Medical Subject Headings (MeSH) controlled vocabulary in order to assign metaterms (MTs), and Journal Descriptor Indexing (JDI), based on human categorization of about 4,000 journals and statistical associations between journal descriptors (JDs) and textwords in the documents. We evaluate and compare the performance of these systems against a gold standard of humanly assigned categories for 100 MEDLINE documents, using six measures selected from trec_eval. The results show that for five of the measures performance is comparable, and for one measure JDI is superior. We conclude that these results favor JDI, given the significantly greater intellectual overhead involved in human indexing and maintaining a rule base for mapping MeSH terms to MTs. We also note a JDI method that associates JDs with MeSH indexing rather than textwords, and it may be worthwhile to investigate whether this JDI method (statistical) and CISMeF (rule-based) might be combined and then evaluated showing they are complementary to one another.

Theme

Automatisches Indexieren
Automatisches Klassifizieren

Field

Medizin

Object

MEDLINE

Similar documents (author)

1. Humphrey, S.M.: Use and management of classification systems for knowledge-based indexing (1992) 2.09

   2.0917084 = sum of:
     2.0917084 = product of:
       4.183417 = sum of:
         4.183417 = weight(author_txt:humphrey in 2094) [ClassicSimilarity], result of:
           4.183417 = score(doc=2094,freq=1.0), product of:
             0.7198056 = queryWeight, product of:
               1.0182934 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.07601625 = queryNorm
             5.81187 = fieldWeight in 2094, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.625 = fieldNorm(doc=2094)
       0.5 = coord(1/2)
   

2. Humphrey, S.M.: Indexing biomedical documents : from thesaural to knowledge-based retrieval systems (1992) 2.09

   2.0917084 = sum of:
     2.0917084 = product of:
       4.183417 = sum of:
         4.183417 = weight(author_txt:humphrey in 7641) [ClassicSimilarity], result of:
           4.183417 = score(doc=7641,freq=1.0), product of:
             0.7198056 = queryWeight, product of:
               1.0182934 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.07601625 = queryNorm
             5.81187 = fieldWeight in 7641, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.625 = fieldNorm(doc=7641)
       0.5 = coord(1/2)
   

3. Humphrey, S.M.: ¬The MedIndEx prototype for computer assisted MEDLINE database indexing (1993) 2.09

   2.0917084 = sum of:
     2.0917084 = product of:
       4.183417 = sum of:
         4.183417 = weight(author_txt:humphrey in 7819) [ClassicSimilarity], result of:
           4.183417 = score(doc=7819,freq=1.0), product of:
             0.7198056 = queryWeight, product of:
               1.0182934 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.07601625 = queryNorm
             5.81187 = fieldWeight in 7819, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.625 = fieldNorm(doc=7819)
       0.5 = coord(1/2)
   

4. Humphrey, S.M.: Knowledge-based systems for indexing (1994) 2.09

   2.0917084 = sum of:
     2.0917084 = product of:
       4.183417 = sum of:
         4.183417 = weight(author_txt:humphrey in 2987) [ClassicSimilarity], result of:
           4.183417 = score(doc=2987,freq=1.0), product of:
             0.7198056 = queryWeight, product of:
               1.0182934 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.07601625 = queryNorm
             5.81187 = fieldWeight in 2987, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.625 = fieldNorm(doc=2987)
       0.5 = coord(1/2)
   

5. Humphrey, S.M.: Automatic indexing of documents from journal descriptors : a preliminary investigation (1999) 2.09

   2.0917084 = sum of:
     2.0917084 = product of:
       4.183417 = sum of:
         4.183417 = weight(author_txt:humphrey in 3769) [ClassicSimilarity], result of:
           4.183417 = score(doc=3769,freq=1.0), product of:
             0.7198056 = queryWeight, product of:
               1.0182934 = boost
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.07601625 = queryNorm
             5.81187 = fieldWeight in 3769, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.298992 = idf(docFreq=10, maxDocs=44218)
               0.625 = fieldNorm(doc=3769)
       0.5 = coord(1/2)
   

Similar documents (content)

1. Ruiz, M.E.; Srinivasan, P.: Combining machine learning and hierarchical indexing structures for text categorization (2001) 0.41

   0.4092087 = sum of:
     0.4092087 = product of:
       1.1366907 = sum of:
         0.05367722 = weight(abstract_txt:method in 1595) [ClassicSimilarity], result of:
           0.05367722 = score(doc=1595,freq=2.0), product of:
             0.08994967 = queryWeight, product of:
               1.1440797 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.017467836 = queryNorm
             0.5967473 = fieldWeight in 1595, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.041326027 = weight(abstract_txt:performance in 1595) [ClassicSimilarity], result of:
           0.041326027 = score(doc=1595,freq=1.0), product of:
             0.095198914 = queryWeight, product of:
               1.1769892 = boost
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.017467836 = queryNorm
             0.43410188 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.057780754 = weight(abstract_txt:categories in 1595) [ClassicSimilarity], result of:
           0.057780754 = score(doc=1595,freq=1.0), product of:
             0.11903418 = queryWeight, product of:
               1.3161105 = boost
               5.17774 = idf(docFreq=677, maxDocs=44218)
               0.017467836 = queryNorm
             0.48541313 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.17774 = idf(docFreq=677, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.13082981 = weight(abstract_txt:medline in 1595) [ClassicSimilarity], result of:
           0.13082981 = score(doc=1595,freq=1.0), product of:
             0.20525198 = queryWeight, product of:
               1.7282245 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.017467836 = queryNorm
             0.6374107 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.087570995 = weight(abstract_txt:automatic in 1595) [ClassicSimilarity], result of:
           0.087570995 = score(doc=1595,freq=1.0), product of:
             0.17978501 = queryWeight, product of:
               1.9809744 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.017467836 = queryNorm
             0.48708728 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.033715367 = weight(abstract_txt:based in 1595) [ClassicSimilarity], result of:
           0.033715367 = score(doc=1595,freq=1.0), product of:
             0.112810135 = queryWeight, product of:
               2.0258186 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.017467836 = queryNorm
             0.29886824 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.06850726 = weight(abstract_txt:indexing in 1595) [ClassicSimilarity], result of:
           0.06850726 = score(doc=1595,freq=1.0), product of:
             0.1680031 = queryWeight, product of:
               2.2112107 = boost
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.017467836 = queryNorm
             0.40777382 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3495874 = idf(docFreq=1551, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.24191691 = weight(abstract_txt:mesh in 1595) [ClassicSimilarity], result of:
           0.24191691 = score(doc=1595,freq=1.0), product of:
             0.35396266 = queryWeight, product of:
               2.7795906 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.017467836 = queryNorm
             0.6834532 = fieldWeight in 1595, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
         0.4213664 = weight(abstract_txt:categorization in 1595) [ClassicSimilarity], result of:
           0.4213664 = score(doc=1595,freq=2.0), product of:
             0.48219883 = queryWeight, product of:
               4.1883173 = boost
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.017467836 = queryNorm
             0.87384367 = fieldWeight in 1595, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.09375 = fieldNorm(doc=1595)
       0.36 = coord(9/25)
   

2. Goren-Bar, D.; Kuflik, T.: Supporting user-subjective categorization with self-organizing maps and learning vector quantization (2005) 0.28

   0.27678877 = sum of:
     0.27678877 = product of:
       0.98853135 = sum of:
         0.008788632 = weight(abstract_txt:from in 3325) [ClassicSimilarity], result of:
           0.008788632 = score(doc=3325,freq=1.0), product of:
             0.05087702 = queryWeight, product of:
               1.0538116 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017467836 = queryNorm
             0.17274266 = fieldWeight in 3325, 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=3325)
         0.025303684 = weight(abstract_txt:method in 3325) [ClassicSimilarity], result of:
           0.025303684 = score(doc=3325,freq=1.0), product of:
             0.08994967 = queryWeight, product of:
               1.1440797 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.017467836 = queryNorm
             0.28130937 = fieldWeight in 3325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
         0.04299698 = weight(abstract_txt:human in 3325) [ClassicSimilarity], result of:
           0.04299698 = score(doc=3325,freq=1.0), product of:
             0.1466221 = queryWeight, product of:
               1.788965 = boost
               4.692005 = idf(docFreq=1101, maxDocs=44218)
               0.017467836 = queryNorm
             0.29325032 = fieldWeight in 3325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.692005 = idf(docFreq=1101, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
         0.11676133 = weight(abstract_txt:automatic in 3325) [ClassicSimilarity], result of:
           0.11676133 = score(doc=3325,freq=4.0), product of:
             0.17978501 = queryWeight, product of:
               1.9809744 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.017467836 = queryNorm
             0.6494497 = fieldWeight in 3325, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
         0.02247691 = weight(abstract_txt:based in 3325) [ClassicSimilarity], result of:
           0.02247691 = score(doc=3325,freq=1.0), product of:
             0.112810135 = queryWeight, product of:
               2.0258186 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.017467836 = queryNorm
             0.19924548 = fieldWeight in 3325, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
         0.08411537 = weight(abstract_txt:documents in 3325) [ClassicSimilarity], result of:
           0.08411537 = score(doc=3325,freq=3.0), product of:
             0.18853858 = queryWeight, product of:
               2.6189466 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.017467836 = queryNorm
             0.44614407 = fieldWeight in 3325, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
         0.6880884 = weight(abstract_txt:categorization in 3325) [ClassicSimilarity], result of:
           0.6880884 = score(doc=3325,freq=12.0), product of:
             0.48219883 = queryWeight, product of:
               4.1883173 = boost
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.017467836 = queryNorm
             1.4269807 = fieldWeight in 3325, product of:
               3.4641016 = tf(freq=12.0), with freq of:
                 12.0 = termFreq=12.0
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.0625 = fieldNorm(doc=3325)
       0.28 = coord(7/25)
   

3. Kim, J.-H.; Choi, K.-S.: Patent document categorization based on semantic structural information (2007) 0.18

   0.18435776 = sum of:
     0.18435776 = product of:
       0.76815736 = sum of:
         0.012429003 = weight(abstract_txt:from in 933) [ClassicSimilarity], result of:
           0.012429003 = score(doc=933,freq=2.0), product of:
             0.05087702 = queryWeight, product of:
               1.0538116 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017467836 = queryNorm
             0.24429502 = fieldWeight in 933, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.0625 = fieldNorm(doc=933)
         0.025303684 = weight(abstract_txt:method in 933) [ClassicSimilarity], result of:
           0.025303684 = score(doc=933,freq=1.0), product of:
             0.08994967 = queryWeight, product of:
               1.1440797 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.017467836 = queryNorm
             0.28130937 = fieldWeight in 933, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.0625 = fieldNorm(doc=933)
         0.027550686 = weight(abstract_txt:performance in 933) [ClassicSimilarity], result of:
           0.027550686 = score(doc=933,freq=1.0), product of:
             0.095198914 = queryWeight, product of:
               1.1769892 = boost
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.017467836 = queryNorm
             0.28940126 = fieldWeight in 933, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.63042 = idf(docFreq=1171, maxDocs=44218)
               0.0625 = fieldNorm(doc=933)
         0.058380663 = weight(abstract_txt:automatic in 933) [ClassicSimilarity], result of:
           0.058380663 = score(doc=933,freq=1.0), product of:
             0.17978501 = queryWeight, product of:
               1.9809744 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.017467836 = queryNorm
             0.32472485 = fieldWeight in 933, 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=933)
         0.11895711 = weight(abstract_txt:documents in 933) [ClassicSimilarity], result of:
           0.11895711 = score(doc=933,freq=6.0), product of:
             0.18853858 = queryWeight, product of:
               2.6189466 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.017467836 = queryNorm
             0.63094306 = fieldWeight in 933, 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=933)
         0.52553624 = weight(abstract_txt:categorization in 933) [ClassicSimilarity], result of:
           0.52553624 = score(doc=933,freq=7.0), product of:
             0.48219883 = queryWeight, product of:
               4.1883173 = boost
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.017467836 = queryNorm
             1.0898745 = fieldWeight in 933, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.0625 = fieldNorm(doc=933)
       0.24 = coord(6/25)
   

4. Stapleton, M.; Adams, M.: Faceted categorisation for the corporate desktop : visualisation and interaction using metadata to enhance user experience (2007) 0.17

   0.17212602 = sum of:
     0.17212602 = product of:
       0.71719176 = sum of:
         0.015536253 = weight(abstract_txt:from in 718) [ClassicSimilarity], result of:
           0.015536253 = score(doc=718,freq=2.0), product of:
             0.05087702 = queryWeight, product of:
               1.0538116 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017467836 = queryNorm
             0.30536878 = fieldWeight in 718, 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=718)
         0.053746223 = weight(abstract_txt:human in 718) [ClassicSimilarity], result of:
           0.053746223 = score(doc=718,freq=1.0), product of:
             0.1466221 = queryWeight, product of:
               1.788965 = boost
               4.692005 = idf(docFreq=1101, maxDocs=44218)
               0.017467836 = queryNorm
             0.3665629 = fieldWeight in 718, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.692005 = idf(docFreq=1101, maxDocs=44218)
               0.078125 = fieldNorm(doc=718)
         0.07297583 = weight(abstract_txt:automatic in 718) [ClassicSimilarity], result of:
           0.07297583 = score(doc=718,freq=1.0), product of:
             0.17978501 = queryWeight, product of:
               1.9809744 = boost
               5.1955976 = idf(docFreq=665, maxDocs=44218)
               0.017467836 = queryNorm
             0.40590608 = fieldWeight in 718, 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=718)
         0.03973394 = weight(abstract_txt:based in 718) [ClassicSimilarity], result of:
           0.03973394 = score(doc=718,freq=2.0), product of:
             0.112810135 = queryWeight, product of:
               2.0258186 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.017467836 = queryNorm
             0.35221958 = fieldWeight in 718, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.078125 = fieldNorm(doc=718)
         0.10514421 = weight(abstract_txt:documents in 718) [ClassicSimilarity], result of:
           0.10514421 = score(doc=718,freq=3.0), product of:
             0.18853858 = queryWeight, product of:
               2.6189466 = boost
               4.1213026 = idf(docFreq=1949, maxDocs=44218)
               0.017467836 = queryNorm
             0.5576801 = fieldWeight in 718, 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=718)
         0.4300553 = weight(abstract_txt:categorization in 718) [ClassicSimilarity], result of:
           0.4300553 = score(doc=718,freq=3.0), product of:
             0.48219883 = queryWeight, product of:
               4.1883173 = boost
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.017467836 = queryNorm
             0.891863 = fieldWeight in 718, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.590942 = idf(docFreq=164, maxDocs=44218)
               0.078125 = fieldNorm(doc=718)
       0.24 = coord(6/25)
   

5. Rotolo, D.; Leydesdorff, L.: Matching Medline/PubMed data with Web of Science: A routine in R language (2015) 0.17

   0.17081203 = sum of:
     0.17081203 = product of:
       0.6100429 = sum of:
         0.015536253 = weight(abstract_txt:from in 2224) [ClassicSimilarity], result of:
           0.015536253 = score(doc=2224,freq=2.0), product of:
             0.05087702 = queryWeight, product of:
               1.0538116 = boost
               2.7638826 = idf(docFreq=7577, maxDocs=44218)
               0.017467836 = queryNorm
             0.30536878 = fieldWeight in 2224, 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=2224)
         0.031629603 = weight(abstract_txt:method in 2224) [ClassicSimilarity], result of:
           0.031629603 = score(doc=2224,freq=1.0), product of:
             0.08994967 = queryWeight, product of:
               1.1440797 = boost
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.017467836 = queryNorm
             0.3516367 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.50095 = idf(docFreq=1333, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.04734411 = weight(abstract_txt:journal in 2224) [ClassicSimilarity], result of:
           0.04734411 = score(doc=2224,freq=1.0), product of:
             0.11770123 = queryWeight, product of:
               1.3087208 = boost
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.017467836 = queryNorm
             0.4022397 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1486683 = idf(docFreq=697, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.04815063 = weight(abstract_txt:categories in 2224) [ClassicSimilarity], result of:
           0.04815063 = score(doc=2224,freq=1.0), product of:
             0.11903418 = queryWeight, product of:
               1.3161105 = boost
               5.17774 = idf(docFreq=677, maxDocs=44218)
               0.017467836 = queryNorm
             0.40451095 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.17774 = idf(docFreq=677, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.1541844 = weight(abstract_txt:medline in 2224) [ClassicSimilarity], result of:
           0.1541844 = score(doc=2224,freq=2.0), product of:
             0.20525198 = queryWeight, product of:
               1.7282245 = boost
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.017467836 = queryNorm
             0.75119567 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.7990475 = idf(docFreq=133, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.028096136 = weight(abstract_txt:based in 2224) [ClassicSimilarity], result of:
           0.028096136 = score(doc=2224,freq=1.0), product of:
             0.112810135 = queryWeight, product of:
               2.0258186 = boost
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.017467836 = queryNorm
             0.24905685 = fieldWeight in 2224, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.1879277 = idf(docFreq=4958, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
         0.2851018 = weight(abstract_txt:mesh in 2224) [ClassicSimilarity], result of:
           0.2851018 = score(doc=2224,freq=2.0), product of:
             0.35396266 = queryWeight, product of:
               2.7795906 = boost
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.017467836 = queryNorm
             0.8054573 = fieldWeight in 2224, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.290168 = idf(docFreq=81, maxDocs=44218)
               0.078125 = fieldNorm(doc=2224)
       0.28 = coord(7/25)