Document (#40014)

Author

Gonzalez-Agirre, A.
Rigau, G.
Agirre, E.
Aletras, N.
Stevenson, M.

Title

Why are these similar? : investigating item similarity types in a large digital library

Source

Journal of the Association for Information Science and Technology. 67(2016) no.7, S.1624-1638

Year

2016

Abstract

We introduce a new problem, identifying the type of relation that holds between a pair of similar items in a digital library. Being able to provide a reason why items are similar has applications in recommendation, personalization, and search. We investigate the problem within the context of Europeana, a large digital library containing items related to cultural heritage. A range of types of similarity in this collection were identified. A set of 1,500 pairs of items from the collection were annotated using crowdsourcing. A high intertagger agreement (average 71.5 Pearson correlation) was obtained and demonstrates that the task is well defined. We also present several approaches to automatically identifying the type of similarity. The best system applies linear regression and achieves a mean Pearson correlation of 71.3, close to human performance. The problem formulation and data set described here were used in a public evaluation exercise, the *SEM shared task on Semantic Textual Similarity. The task attracted the participation of 6 teams, who submitted 14 system runs. All annotations, evaluation scripts, and system runs are freely available.

Content

Vgl.: http://onlinelibrary.wiley.com/doi/10.1002/asi.23482/abstract.

Object

Europeana

Similar documents (author)

1. Stevenson, G.: ¬The Mainzer Sachkatalog and his background (1970) 5.81

   5.814733 = sum of:
     5.814733 = weight(author_txt:stevenson in 753) [ClassicSimilarity], result of:
       5.814733 = fieldWeight in 753, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.303573 = idf(docFreq=10, maxDocs=44421)
         0.625 = fieldNorm(doc=753)
   

2. Stevenson, G.: ¬The historical context: traditional classification since 1950 (1974) 5.81

   5.814733 = sum of:
     5.814733 = weight(author_txt:stevenson in 1258) [ClassicSimilarity], result of:
       5.814733 = fieldWeight in 1258, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.303573 = idf(docFreq=10, maxDocs=44421)
         0.625 = fieldNorm(doc=1258)
   

3. Stevenson, G.: Andreas Schleiermacher's bibliographic classification and its relationship to the Dewey Decimal Classification (1978) 5.81

   5.814733 = sum of:
     5.814733 = weight(author_txt:stevenson in 3549) [ClassicSimilarity], result of:
       5.814733 = fieldWeight in 3549, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.303573 = idf(docFreq=10, maxDocs=44421)
         0.625 = fieldNorm(doc=3549)
   

4. McDonald, S.; Stevenson, R.J.: Navigation in hyperspace : an evaluation of the effects of navigational tools and subject matter expertise on browsing and information retrieval in hypertext (1998) 4.65

   4.6517863 = sum of:
     4.6517863 = weight(author_txt:stevenson in 4760) [ClassicSimilarity], result of:
       4.6517863 = fieldWeight in 4760, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.303573 = idf(docFreq=10, maxDocs=44421)
         0.5 = fieldNorm(doc=4760)
   

5. Cole, C.; Mandelblatt, B.; Stevenson, J.: Visualizing a high recall search strategy output for undergraduates in an exploration stage of researching a term paper (2002) 3.49

   3.4888396 = sum of:
     3.4888396 = weight(author_txt:stevenson in 3575) [ClassicSimilarity], result of:
       3.4888396 = fieldWeight in 3575, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         9.303573 = idf(docFreq=10, maxDocs=44421)
         0.375 = fieldNorm(doc=3575)
   

Similar documents (content)

1. Huuskonen, S.; Vakkari, P.: Students' search process and outcome in Medline in writing an essay for a class on evidence-based medicine (2008) 0.18

   0.1808241 = sum of:
     0.1808241 = product of:
       0.64580035 = sum of:
         0.037266213 = weight(abstract_txt:evaluation in 2891) [ClassicSimilarity], result of:
           0.037266213 = score(doc=2891,freq=2.0), product of:
             0.10756473 = queryWeight, product of:
               1.1997899 = boost
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.020013468 = queryNorm
             0.34645385 = fieldWeight in 2891, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.016870448 = weight(abstract_txt:system in 2891) [ClassicSimilarity], result of:
           0.016870448 = score(doc=2891,freq=1.0), product of:
             0.091464214 = queryWeight, product of:
               1.3550068 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.020013468 = queryNorm
             0.18444863 = fieldWeight in 2891, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.043380994 = weight(abstract_txt:were in 2891) [ClassicSimilarity], result of:
           0.043380994 = score(doc=2891,freq=4.0), product of:
             0.10814666 = queryWeight, product of:
               1.4734061 = boost
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.020013468 = queryNorm
             0.40113115 = fieldWeight in 2891, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.07470972 = weight(abstract_txt:correlation in 2891) [ClassicSimilarity], result of:
           0.07470972 = score(doc=2891,freq=1.0), product of:
             0.21547048 = queryWeight, product of:
               1.6981034 = boost
               6.3401756 = idf(docFreq=212, maxDocs=44421)
               0.020013468 = queryNorm
             0.34672835 = fieldWeight in 2891, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.3401756 = idf(docFreq=212, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.103827864 = weight(abstract_txt:task in 2891) [ClassicSimilarity], result of:
           0.103827864 = score(doc=2891,freq=4.0), product of:
             0.19350375 = queryWeight, product of:
               1.9708817 = boost
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.020013468 = queryNorm
             0.5365677 = fieldWeight in 2891, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.19341478 = weight(abstract_txt:pearson in 2891) [ClassicSimilarity], result of:
           0.19341478 = score(doc=2891,freq=1.0), product of:
             0.40625256 = queryWeight, product of:
               2.3316765 = boost
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.020013468 = queryNorm
             0.4760949 = fieldWeight in 2891, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.705735 = idf(docFreq=19, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
         0.17633034 = weight(abstract_txt:items in 2891) [ClassicSimilarity], result of:
           0.17633034 = score(doc=2891,freq=3.0), product of:
             0.33367524 = queryWeight, product of:
               2.9884586 = boost
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.020013468 = queryNorm
             0.528449 = fieldWeight in 2891, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.0546875 = fieldNorm(doc=2891)
       0.28 = coord(7/25)
   

2. Pollitt, A.S.; Tinker, A.J.: Enhanced view-based searching through the decomposition of Dewey Decimal Classification codes (2000) 0.15

   0.15341534 = sum of:
     0.15341534 = product of:
       0.47942293 = sum of:
         0.02569875 = weight(abstract_txt:large in 486) [ClassicSimilarity], result of:
           0.02569875 = score(doc=486,freq=1.0), product of:
             0.105781816 = queryWeight, product of:
               1.1898049 = boost
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.020013468 = queryNorm
             0.24294108 = fieldWeight in 486, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4423513 = idf(docFreq=1420, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.041671433 = weight(abstract_txt:collection in 486) [ClassicSimilarity], result of:
           0.041671433 = score(doc=486,freq=2.0), product of:
             0.11588272 = queryWeight, product of:
               1.245316 = boost
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.020013468 = queryNorm
             0.35960007 = fieldWeight in 486, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.03188351 = weight(abstract_txt:library in 486) [ClassicSimilarity], result of:
           0.03188351 = score(doc=486,freq=5.0), product of:
             0.08176251 = queryWeight, product of:
               1.2811294 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.020013468 = queryNorm
             0.38995272 = fieldWeight in 486, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.023858417 = weight(abstract_txt:system in 486) [ClassicSimilarity], result of:
           0.023858417 = score(doc=486,freq=2.0), product of:
             0.091464214 = queryWeight, product of:
               1.3550068 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.020013468 = queryNorm
             0.26084974 = fieldWeight in 486, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.05039418 = weight(abstract_txt:digital in 486) [ClassicSimilarity], result of:
           0.05039418 = score(doc=486,freq=2.0), product of:
             0.15057182 = queryWeight, product of:
               1.7385522 = boost
               4.3274655 = idf(docFreq=1593, maxDocs=44421)
               0.020013468 = queryNorm
             0.33468533 = fieldWeight in 486, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3274655 = idf(docFreq=1593, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.06753831 = weight(abstract_txt:problem in 486) [ClassicSimilarity], result of:
           0.06753831 = score(doc=486,freq=3.0), product of:
             0.15989192 = queryWeight, product of:
               1.7915509 = boost
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.020013468 = queryNorm
             0.4223998 = fieldWeight in 486, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.4593854 = idf(docFreq=1396, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.062047973 = weight(abstract_txt:similar in 486) [ClassicSimilarity], result of:
           0.062047973 = score(doc=486,freq=1.0), product of:
             0.21793076 = queryWeight, product of:
               2.0915833 = boost
               5.206202 = idf(docFreq=661, maxDocs=44421)
               0.020013468 = queryNorm
             0.28471416 = fieldWeight in 486, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.206202 = idf(docFreq=661, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
         0.17633034 = weight(abstract_txt:items in 486) [ClassicSimilarity], result of:
           0.17633034 = score(doc=486,freq=3.0), product of:
             0.33367524 = queryWeight, product of:
               2.9884586 = boost
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.020013468 = queryNorm
             0.528449 = fieldWeight in 486, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.0546875 = fieldNorm(doc=486)
       0.32 = coord(8/25)
   

3. Dani, A.; Chatzopoulou, C.; Siatri, R.; Mystakopoulos, F.; Antonopoulou, S.; Katrinaki, E.; Garoufallou, E.: Digital libraries evaluation : measuring Europeana's usability (2015) 0.15

   0.14759271 = sum of:
     0.14759271 = product of:
       0.46122724 = sum of:
         0.14524502 = weight(abstract_txt:europeana in 3395) [ClassicSimilarity], result of:
           0.14524502 = score(doc=3395,freq=3.0), product of:
             0.16897617 = queryWeight, product of:
               1.0633298 = boost
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.020013468 = queryNorm
             0.8595592 = fieldWeight in 3395, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.9402676 = idf(docFreq=42, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.029824084 = weight(abstract_txt:types in 3395) [ClassicSimilarity], result of:
           0.029824084 = score(doc=3395,freq=1.0), product of:
             0.10686934 = queryWeight, product of:
               1.1959053 = boost
               4.4651284 = idf(docFreq=1388, maxDocs=44421)
               0.020013468 = queryNorm
             0.27907053 = fieldWeight in 3395, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4651284 = idf(docFreq=1388, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.030115651 = weight(abstract_txt:evaluation in 3395) [ClassicSimilarity], result of:
           0.030115651 = score(doc=3395,freq=1.0), product of:
             0.10756473 = queryWeight, product of:
               1.1997899 = boost
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.020013468 = queryNorm
             0.279977 = fieldWeight in 3395, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.479632 = idf(docFreq=1368, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.033675604 = weight(abstract_txt:collection in 3395) [ClassicSimilarity], result of:
           0.033675604 = score(doc=3395,freq=1.0), product of:
             0.11588272 = queryWeight, product of:
               1.245316 = boost
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.020013468 = queryNorm
             0.29060075 = fieldWeight in 3395, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.649612 = idf(docFreq=1154, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.028224982 = weight(abstract_txt:library in 3395) [ClassicSimilarity], result of:
           0.028224982 = score(doc=3395,freq=3.0), product of:
             0.08176251 = queryWeight, product of:
               1.2811294 = boost
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.020013468 = queryNorm
             0.34520692 = fieldWeight in 3395, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.188885 = idf(docFreq=4976, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.035057135 = weight(abstract_txt:were in 3395) [ClassicSimilarity], result of:
           0.035057135 = score(doc=3395,freq=2.0), product of:
             0.10814666 = queryWeight, product of:
               1.4734061 = boost
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.020013468 = queryNorm
             0.3241629 = fieldWeight in 3395, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.09975461 = weight(abstract_txt:digital in 3395) [ClassicSimilarity], result of:
           0.09975461 = score(doc=3395,freq=6.0), product of:
             0.15057182 = queryWeight, product of:
               1.7385522 = boost
               4.3274655 = idf(docFreq=1593, maxDocs=44421)
               0.020013468 = queryNorm
             0.66250515 = fieldWeight in 3395, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               4.3274655 = idf(docFreq=1593, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
         0.059330206 = weight(abstract_txt:task in 3395) [ClassicSimilarity], result of:
           0.059330206 = score(doc=3395,freq=1.0), product of:
             0.19350375 = queryWeight, product of:
               1.9708817 = boost
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.020013468 = queryNorm
             0.3066101 = fieldWeight in 3395, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.0625 = fieldNorm(doc=3395)
       0.32 = coord(8/25)
   

4. Thelwall, M.; Wilkinson, D.: Finding similar academic Web sites with links, bibliometric couplings and colinks (2004) 0.13

   0.13323423 = sum of:
     0.13323423 = product of:
       0.55514264 = sum of:
         0.04168037 = weight(abstract_txt:type in 3571) [ClassicSimilarity], result of:
           0.04168037 = score(doc=3571,freq=1.0), product of:
             0.13358656 = queryWeight, product of:
               1.3370622 = boost
               4.992163 = idf(docFreq=819, maxDocs=44421)
               0.020013468 = queryNorm
             0.3120102 = fieldWeight in 3571, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.992163 = idf(docFreq=819, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
         0.042936046 = weight(abstract_txt:were in 3571) [ClassicSimilarity], result of:
           0.042936046 = score(doc=3571,freq=3.0), product of:
             0.10814666 = queryWeight, product of:
               1.4734061 = boost
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.020013468 = queryNorm
             0.39701685 = fieldWeight in 3571, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.6674848 = idf(docFreq=3083, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
         0.059807997 = weight(abstract_txt:identifying in 3571) [ClassicSimilarity], result of:
           0.059807997 = score(doc=3571,freq=1.0), product of:
             0.16994742 = queryWeight, product of:
               1.508091 = boost
               5.6307297 = idf(docFreq=432, maxDocs=44421)
               0.020013468 = queryNorm
             0.3519206 = fieldWeight in 3571, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.6307297 = idf(docFreq=432, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
         0.059330206 = weight(abstract_txt:task in 3571) [ClassicSimilarity], result of:
           0.059330206 = score(doc=3571,freq=1.0), product of:
             0.19350375 = queryWeight, product of:
               1.9708817 = boost
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.020013468 = queryNorm
             0.3066101 = fieldWeight in 3571, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.9057617 = idf(docFreq=893, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
         0.12282314 = weight(abstract_txt:similar in 3571) [ClassicSimilarity], result of:
           0.12282314 = score(doc=3571,freq=3.0), product of:
             0.21793076 = queryWeight, product of:
               2.0915833 = boost
               5.206202 = idf(docFreq=661, maxDocs=44421)
               0.020013468 = queryNorm
             0.5635879 = fieldWeight in 3571, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.206202 = idf(docFreq=661, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
         0.22856489 = weight(abstract_txt:similarity in 3571) [ClassicSimilarity], result of:
           0.22856489 = score(doc=3571,freq=3.0), product of:
             0.36289778 = queryWeight, product of:
               3.1165738 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.020013468 = queryNorm
             0.6298327 = fieldWeight in 3571, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.0625 = fieldNorm(doc=3571)
       0.24 = coord(6/25)
   

5. Tudhope, D.; Taylor, C.: ¬A unified similarity coefficient for navigating through multi-dimensional information (1996) 0.13

   0.13259311 = sum of:
     0.13259311 = product of:
       0.66296554 = sum of:
         0.0372801 = weight(abstract_txt:types in 529) [ClassicSimilarity], result of:
           0.0372801 = score(doc=529,freq=1.0), product of:
             0.10686934 = queryWeight, product of:
               1.1959053 = boost
               4.4651284 = idf(docFreq=1388, maxDocs=44421)
               0.020013468 = queryNorm
             0.34883815 = fieldWeight in 529, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4651284 = idf(docFreq=1388, maxDocs=44421)
               0.078125 = fieldNorm(doc=529)
         0.052100457 = weight(abstract_txt:type in 529) [ClassicSimilarity], result of:
           0.052100457 = score(doc=529,freq=1.0), product of:
             0.13358656 = queryWeight, product of:
               1.3370622 = boost
               4.992163 = idf(docFreq=819, maxDocs=44421)
               0.020013468 = queryNorm
             0.39001274 = fieldWeight in 529, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.992163 = idf(docFreq=819, maxDocs=44421)
               0.078125 = fieldNorm(doc=529)
         0.024100645 = weight(abstract_txt:system in 529) [ClassicSimilarity], result of:
           0.024100645 = score(doc=529,freq=1.0), product of:
             0.091464214 = queryWeight, product of:
               1.3550068 = boost
               3.372775 = idf(docFreq=4140, maxDocs=44421)
               0.020013468 = queryNorm
             0.26349807 = fieldWeight in 529, 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=529)
         0.14543483 = weight(abstract_txt:items in 529) [ClassicSimilarity], result of:
           0.14543483 = score(doc=529,freq=1.0), product of:
             0.33367524 = queryWeight, product of:
               2.9884586 = boost
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.020013468 = queryNorm
             0.43585742 = fieldWeight in 529, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.5789747 = idf(docFreq=455, maxDocs=44421)
               0.078125 = fieldNorm(doc=529)
         0.4040495 = weight(abstract_txt:similarity in 529) [ClassicSimilarity], result of:
           0.4040495 = score(doc=529,freq=6.0), product of:
             0.36289778 = queryWeight, product of:
               3.1165738 = boost
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.020013468 = queryNorm
             1.1133975 = fieldWeight in 529, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.8181453 = idf(docFreq=358, maxDocs=44421)
               0.078125 = fieldNorm(doc=529)
       0.2 = coord(5/25)