Document (#41302)

Author

Hider, P.

Title

¬The search value added by professional indexing to a bibliographic database

Source

Knowledge organization. 45(2018) no.1, S.23-32

Year

2018

Abstract

Gross et al. (2015) have demonstrated that about a quarter of hits would typically be lost to keyword searchers if contemporary academic library catalogs dropped their controlled subject headings. This article reports on an investigation of the search value that subject descriptors and identifiers assigned by professional indexers add to a bibliographic database, namely the Australian Education Index (AEI). First, a similar methodology to that developed by Gross et al. (2015) was applied, with keyword searches representing a range of educational topics run on the AEI database with and without its subject indexing. The results indicated that AEI users would also lose, on average, about a quarter of hits per query. Second, an alternative research design was applied in which an experienced literature searcher was asked to find resources on a set of educational topics on an AEI database stripped of its subject indexing and then asked to search for additional resources on the same topics after the subject indexing had been reinserted. In this study, the proportion of additional resources that would have been lost had it not been for the subject indexing was again found to be about a quarter of the total resources found for each topic, on average.

Theme

Retrievalstudien
Volltextretrieval

Similar documents (author)

1. Hider, P.: ¬The bibliographic advantages of a centralised union catalogue for ILL and resource sharing (2003) 5.48

   5.4764457 = sum of:
     5.4764457 = weight(author_txt:hider in 2738) [ClassicSimilarity], result of:
       5.4764457 = fieldWeight in 2738, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.762313 = idf(docFreq=17, maxDocs=42306)
         0.625 = fieldNorm(doc=2738)
   

2. Hider, P.: Developing courseware for cataloguing (2000) 5.48

   5.4764457 = sum of:
     5.4764457 = weight(author_txt:hider in 3279) [ClassicSimilarity], result of:
       5.4764457 = fieldWeight in 3279, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.762313 = idf(docFreq=17, maxDocs=42306)
         0.625 = fieldNorm(doc=3279)
   

3. Hider, P.: ¬A survey of continuing professional development activities and attitudes amongst catalogers (2006) 5.48

   5.4764457 = sum of:
     5.4764457 = weight(author_txt:hider in 773) [ClassicSimilarity], result of:
       5.4764457 = fieldWeight in 773, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.762313 = idf(docFreq=17, maxDocs=42306)
         0.625 = fieldNorm(doc=773)
   

4. Hider, P.: Familial authorship in the Anglo-American cataloging tradition (2007) 5.48

   5.4764457 = sum of:
     5.4764457 = weight(author_txt:hider in 2786) [ClassicSimilarity], result of:
       5.4764457 = fieldWeight in 2786, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.762313 = idf(docFreq=17, maxDocs=42306)
         0.625 = fieldNorm(doc=2786)
   

5. Hider, P.M.: Constructing an index of search goal redefinition through transaction log analysis (2007) 5.48

   5.4764457 = sum of:
     5.4764457 = weight(author_txt:hider in 2827) [ClassicSimilarity], result of:
       5.4764457 = fieldWeight in 2827, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.762313 = idf(docFreq=17, maxDocs=42306)
         0.625 = fieldNorm(doc=2827)
   

Similar documents (content)

1. Hider, P.: ¬The search value added by professional indexing to a bibliographic database (2017) 1.58

   1.5769252 = sum of:
     1.5769252 = product of:
       1.9711565 = sum of:
         0.024783045 = weight(abstract_txt:value in 787) [ClassicSimilarity], result of:
           0.024783045 = score(doc=787,freq=1.0), product of:
             0.089536965 = queryWeight, product of:
               4.4286594 = idf(docFreq=1371, maxDocs=42306)
               0.020217622 = queryNorm
             0.27679121 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.4286594 = idf(docFreq=1371, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.045521673 = weight(abstract_txt:found in 787) [ClassicSimilarity], result of:
           0.045521673 = score(doc=787,freq=3.0), product of:
             0.09311171 = queryWeight, product of:
               1.019767 = boost
               4.516201 = idf(docFreq=1256, maxDocs=42306)
               0.020217622 = queryNorm
             0.4888931 = fieldWeight in 787, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.516201 = idf(docFreq=1256, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.11661556 = weight(abstract_txt:dropped in 787) [ClassicSimilarity], result of:
           0.11661556 = score(doc=787,freq=1.0), product of:
             0.19955392 = queryWeight, product of:
               1.0556355 = boost
               9.3501 = idf(docFreq=9, maxDocs=42306)
               0.020217622 = queryNorm
             0.5843812 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.3501 = idf(docFreq=9, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.0413445 = weight(abstract_txt:professional in 787) [ClassicSimilarity], result of:
           0.0413445 = score(doc=787,freq=1.0), product of:
             0.12594408 = queryWeight, product of:
               1.1860082 = boost
               5.2524266 = idf(docFreq=601, maxDocs=42306)
               0.020217622 = queryNorm
             0.32827666 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2524266 = idf(docFreq=601, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.020714672 = weight(abstract_txt:been in 787) [ClassicSimilarity], result of:
           0.020714672 = score(doc=787,freq=1.0), product of:
             0.0909456 = queryWeight, product of:
               1.2343414 = boost
               3.6443186 = idf(docFreq=3005, maxDocs=42306)
               0.020217622 = queryNorm
             0.22776991 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6443186 = idf(docFreq=3005, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.052044965 = weight(abstract_txt:additional in 787) [ClassicSimilarity], result of:
           0.052044965 = score(doc=787,freq=1.0), product of:
             0.14683121 = queryWeight, product of:
               1.2805839 = boost
               5.67127 = idf(docFreq=395, maxDocs=42306)
               0.020217622 = queryNorm
             0.35445437 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.67127 = idf(docFreq=395, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.059372697 = weight(abstract_txt:average in 787) [ClassicSimilarity], result of:
           0.059372697 = score(doc=787,freq=1.0), product of:
             0.1603087 = queryWeight, product of:
               1.3380655 = boost
               5.9258366 = idf(docFreq=306, maxDocs=42306)
               0.020217622 = queryNorm
             0.3703648 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9258366 = idf(docFreq=306, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.026672013 = weight(abstract_txt:about in 787) [ClassicSimilarity], result of:
           0.026672013 = score(doc=787,freq=1.0), product of:
             0.10763831 = queryWeight, product of:
               1.3428512 = boost
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.020217622 = queryNorm
             0.24779294 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.026247855 = weight(abstract_txt:that in 787) [ClassicSimilarity], result of:
           0.026247855 = score(doc=787,freq=7.0), product of:
             0.06600484 = queryWeight, product of:
               1.3575528 = boost
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.020217622 = queryNorm
             0.3976656 = fieldWeight in 787, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.0890546 = weight(abstract_txt:keyword in 787) [ClassicSimilarity], result of:
           0.0890546 = score(doc=787,freq=2.0), product of:
             0.16672222 = queryWeight, product of:
               1.3645692 = boost
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.020217622 = queryNorm
             0.5341495 = fieldWeight in 787, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.14564925 = weight(abstract_txt:2015 in 787) [ClassicSimilarity], result of:
           0.14564925 = score(doc=787,freq=2.0), product of:
             0.2314345 = queryWeight, product of:
               1.6077291 = boost
               7.120085 = idf(docFreq=92, maxDocs=42306)
               0.020217622 = queryNorm
             0.62933254 = fieldWeight in 787, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.120085 = idf(docFreq=92, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.09952184 = weight(abstract_txt:would in 787) [ClassicSimilarity], result of:
           0.09952184 = score(doc=787,freq=4.0), product of:
             0.16312553 = queryWeight, product of:
               1.653124 = boost
               4.8807487 = idf(docFreq=872, maxDocs=42306)
               0.020217622 = queryNorm
             0.6100936 = fieldWeight in 787, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.8807487 = idf(docFreq=872, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.11788411 = weight(abstract_txt:lost in 787) [ClassicSimilarity], result of:
           0.11788411 = score(doc=787,freq=1.0), product of:
             0.2532422 = queryWeight, product of:
               1.681771 = boost
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.020217622 = queryNorm
             0.46549946 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.17197587 = weight(abstract_txt:hits in 787) [ClassicSimilarity], result of:
           0.17197587 = score(doc=787,freq=2.0), product of:
             0.25854388 = queryWeight, product of:
               1.699284 = boost
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.020217622 = queryNorm
             0.6651709 = fieldWeight in 787, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.074540414 = weight(abstract_txt:resources in 787) [ClassicSimilarity], result of:
           0.074540414 = score(doc=787,freq=3.0), product of:
             0.1629784 = queryWeight, product of:
               1.908002 = boost
               4.2249455 = idf(docFreq=1681, maxDocs=42306)
               0.020217622 = queryNorm
             0.45736375 = fieldWeight in 787, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.2249455 = idf(docFreq=1681, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.06236407 = weight(abstract_txt:database in 787) [ClassicSimilarity], result of:
           0.06236407 = score(doc=787,freq=2.0), product of:
             0.16564903 = queryWeight, product of:
               1.9235712 = boost
               4.259421 = idf(docFreq=1624, maxDocs=42306)
               0.020217622 = queryNorm
             0.37648317 = fieldWeight in 787, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.259421 = idf(docFreq=1624, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.33247173 = weight(abstract_txt:gross in 787) [ClassicSimilarity], result of:
           0.33247173 = score(doc=787,freq=3.0), product of:
             0.3505059 = queryWeight, product of:
               1.9785475 = boost
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.020217622 = queryNorm
             0.9485482 = fieldWeight in 787, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.08235707 = weight(abstract_txt:indexing in 787) [ClassicSimilarity], result of:
           0.08235707 = score(doc=787,freq=2.0), product of:
             0.21478462 = queryWeight, product of:
               2.4488964 = boost
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.020217622 = queryNorm
             0.38344026 = fieldWeight in 787, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.12527658 = weight(abstract_txt:subject in 787) [ClassicSimilarity], result of:
           0.12527658 = score(doc=787,freq=6.0), product of:
             0.20931605 = queryWeight, product of:
               2.6482606 = boost
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.020217622 = queryNorm
             0.5985044 = fieldWeight in 787, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
         0.256744 = weight(abstract_txt:quarter in 787) [ClassicSimilarity], result of:
           0.256744 = score(doc=787,freq=1.0), product of:
             0.48707578 = queryWeight, product of:
               2.856556 = boost
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.020217622 = queryNorm
             0.527113 = fieldWeight in 787, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.0625 = fieldNorm(doc=787)
       0.8 = coord(20/25)
   

2. Gross, T.; Taylor, A.G.; Joudrey, D.N.: Still a lot to lose : the role of controlled vocabulary in keyword searching (2015) 0.47

   0.47146332 = sum of:
     0.47146332 = product of:
       1.3096203 = sum of:
         0.046460364 = weight(abstract_txt:found in 4008) [ClassicSimilarity], result of:
           0.046460364 = score(doc=4008,freq=2.0), product of:
             0.09311171 = queryWeight, product of:
               1.019767 = boost
               4.516201 = idf(docFreq=1256, maxDocs=42306)
               0.020217622 = queryNorm
             0.49897444 = fieldWeight in 4008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.516201 = idf(docFreq=1256, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.03696268 = weight(abstract_txt:search in 4008) [ClassicSimilarity], result of:
           0.03696268 = score(doc=4008,freq=2.0), product of:
             0.09151423 = queryWeight, product of:
               1.2381942 = boost
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.020217622 = queryNorm
             0.4039009 = fieldWeight in 4008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.027729359 = weight(abstract_txt:that in 4008) [ClassicSimilarity], result of:
           0.027729359 = score(doc=4008,freq=5.0), product of:
             0.06600484 = queryWeight, product of:
               1.3575528 = boost
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.020217622 = queryNorm
             0.42011097 = fieldWeight in 4008, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.11131825 = weight(abstract_txt:keyword in 4008) [ClassicSimilarity], result of:
           0.11131825 = score(doc=4008,freq=2.0), product of:
             0.16672222 = queryWeight, product of:
               1.3645692 = boost
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.020217622 = queryNorm
             0.66768694 = fieldWeight in 4008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.10773555 = weight(abstract_txt:would in 4008) [ClassicSimilarity], result of:
           0.10773555 = score(doc=4008,freq=3.0), product of:
             0.16312553 = queryWeight, product of:
               1.653124 = boost
               4.8807487 = idf(docFreq=872, maxDocs=42306)
               0.020217622 = queryNorm
             0.6604457 = fieldWeight in 4008, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.8807487 = idf(docFreq=872, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.25522655 = weight(abstract_txt:lost in 4008) [ClassicSimilarity], result of:
           0.25522655 = score(doc=4008,freq=3.0), product of:
             0.2532422 = queryWeight, product of:
               1.681771 = boost
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.020217622 = queryNorm
             1.0078359 = fieldWeight in 4008, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.33932754 = weight(abstract_txt:gross in 4008) [ClassicSimilarity], result of:
           0.33932754 = score(doc=4008,freq=2.0), product of:
             0.3505059 = queryWeight, product of:
               1.9785475 = boost
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.020217622 = queryNorm
             0.96810794 = fieldWeight in 4008, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.06392994 = weight(abstract_txt:subject in 4008) [ClassicSimilarity], result of:
           0.06392994 = score(doc=4008,freq=1.0), product of:
             0.20931605 = queryWeight, product of:
               2.6482606 = boost
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.020217622 = queryNorm
             0.30542302 = fieldWeight in 4008, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
         0.32092997 = weight(abstract_txt:quarter in 4008) [ClassicSimilarity], result of:
           0.32092997 = score(doc=4008,freq=1.0), product of:
             0.48707578 = queryWeight, product of:
               2.856556 = boost
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.020217622 = queryNorm
             0.65889126 = fieldWeight in 4008, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.433808 = idf(docFreq=24, maxDocs=42306)
               0.078125 = fieldNorm(doc=4008)
       0.36 = coord(9/25)
   

3. Smiraglia, R.P.: Keywords redux : an editorial (2015) 0.25

   0.25008687 = sum of:
     0.25008687 = product of:
       0.69468576 = sum of:
         0.018295594 = weight(abstract_txt:search in 4100) [ClassicSimilarity], result of:
           0.018295594 = score(doc=4100,freq=1.0), product of:
             0.09151423 = queryWeight, product of:
               1.2381942 = boost
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.020217622 = queryNorm
             0.19992076 = fieldWeight in 4100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.04042262 = weight(abstract_txt:about in 4100) [ClassicSimilarity], result of:
           0.04042262 = score(doc=4100,freq=3.0), product of:
             0.10763831 = queryWeight, product of:
               1.3428512 = boost
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.020217622 = queryNorm
             0.3755412 = fieldWeight in 4100, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.017361324 = weight(abstract_txt:that in 4100) [ClassicSimilarity], result of:
           0.017361324 = score(doc=4100,freq=4.0), product of:
             0.06600484 = queryWeight, product of:
               1.3575528 = boost
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.020217622 = queryNorm
             0.26303107 = fieldWeight in 4100, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.09543552 = weight(abstract_txt:keyword in 4100) [ClassicSimilarity], result of:
           0.09543552 = score(doc=4100,freq=3.0), product of:
             0.16672222 = queryWeight, product of:
               1.3645692 = boost
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.020217622 = queryNorm
             0.5724223 = fieldWeight in 4100, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               6.0432124 = idf(docFreq=272, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.090115875 = weight(abstract_txt:2015 in 4100) [ClassicSimilarity], result of:
           0.090115875 = score(doc=4100,freq=1.0), product of:
             0.2314345 = queryWeight, product of:
               1.6077291 = boost
               7.120085 = idf(docFreq=92, maxDocs=42306)
               0.020217622 = queryNorm
             0.38937962 = fieldWeight in 4100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.120085 = idf(docFreq=92, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.10640464 = weight(abstract_txt:hits in 4100) [ClassicSimilarity], result of:
           0.10640464 = score(doc=4100,freq=1.0), product of:
             0.25854388 = queryWeight, product of:
               1.699284 = boost
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.020217622 = queryNorm
             0.4115535 = fieldWeight in 4100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.16795856 = weight(abstract_txt:gross in 4100) [ClassicSimilarity], result of:
           0.16795856 = score(doc=4100,freq=1.0), product of:
             0.3505059 = queryWeight, product of:
               1.9785475 = boost
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.020217622 = queryNorm
             0.47918898 = fieldWeight in 4100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               8.762313 = idf(docFreq=17, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.113940716 = weight(abstract_txt:indexing in 4100) [ClassicSimilarity], result of:
           0.113940716 = score(doc=4100,freq=5.0), product of:
             0.21478462 = queryWeight, product of:
               2.4488964 = boost
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.020217622 = queryNorm
             0.53048825 = fieldWeight in 4100, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
         0.044750955 = weight(abstract_txt:subject in 4100) [ClassicSimilarity], result of:
           0.044750955 = score(doc=4100,freq=1.0), product of:
             0.20931605 = queryWeight, product of:
               2.6482606 = boost
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.020217622 = queryNorm
             0.21379611 = fieldWeight in 4100, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.0546875 = fieldNorm(doc=4100)
       0.36 = coord(9/25)
   

4. Drabenstott, K.M.: Web search strategies (2000) 0.19

   0.19137523 = sum of:
     0.19137523 = product of:
       0.5980476 = sum of:
         0.02929497 = weight(abstract_txt:been in 2189) [ClassicSimilarity], result of:
           0.02929497 = score(doc=2189,freq=2.0), product of:
             0.0909456 = queryWeight, product of:
               1.2343414 = boost
               3.6443186 = idf(docFreq=3005, maxDocs=42306)
               0.020217622 = queryNorm
             0.3221153 = fieldWeight in 2189, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6443186 = idf(docFreq=3005, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.059140287 = weight(abstract_txt:search in 2189) [ClassicSimilarity], result of:
           0.059140287 = score(doc=2189,freq=8.0), product of:
             0.09151423 = queryWeight, product of:
               1.2381942 = boost
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.020217622 = queryNorm
             0.6462414 = fieldWeight in 2189, product of:
               2.828427 = tf(freq=8.0), with freq of:
                 8.0 = termFreq=8.0
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.026672013 = weight(abstract_txt:about in 2189) [ClassicSimilarity], result of:
           0.026672013 = score(doc=2189,freq=1.0), product of:
             0.10763831 = queryWeight, product of:
               1.3428512 = boost
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.020217622 = queryNorm
             0.24779294 = fieldWeight in 2189, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.964687 = idf(docFreq=2181, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.024300791 = weight(abstract_txt:that in 2189) [ClassicSimilarity], result of:
           0.024300791 = score(doc=2189,freq=6.0), product of:
             0.06600484 = queryWeight, product of:
               1.3575528 = boost
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.020217622 = queryNorm
             0.3681668 = fieldWeight in 2189, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.11788411 = weight(abstract_txt:lost in 2189) [ClassicSimilarity], result of:
           0.11788411 = score(doc=2189,freq=1.0), product of:
             0.2532422 = queryWeight, product of:
               1.681771 = boost
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.020217622 = queryNorm
             0.46549946 = fieldWeight in 2189, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.4479914 = idf(docFreq=66, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.21062656 = weight(abstract_txt:hits in 2189) [ClassicSimilarity], result of:
           0.21062656 = score(doc=2189,freq=3.0), product of:
             0.25854388 = queryWeight, product of:
               1.699284 = boost
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.020217622 = queryNorm
             0.81466466 = fieldWeight in 2189, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               7.52555 = idf(docFreq=61, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.05780047 = weight(abstract_txt:topics in 2189) [ClassicSimilarity], result of:
           0.05780047 = score(doc=2189,freq=1.0), product of:
             0.1802536 = queryWeight, product of:
               1.7377465 = boost
               5.1305914 = idf(docFreq=679, maxDocs=42306)
               0.020217622 = queryNorm
             0.32066196 = fieldWeight in 2189, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.1305914 = idf(docFreq=679, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
         0.07232847 = weight(abstract_txt:subject in 2189) [ClassicSimilarity], result of:
           0.07232847 = score(doc=2189,freq=2.0), product of:
             0.20931605 = queryWeight, product of:
               2.6482606 = boost
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.020217622 = queryNorm
             0.3455467 = fieldWeight in 2189, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.0625 = fieldNorm(doc=2189)
       0.32 = coord(8/25)
   

5. Lepsky, K.; Siepmann, J.; Zimmermann, A.: Automatische Indexierung für Online-Kataloge : Ergebnisse eines Retrievaltests (1996) 0.17

   0.16589169 = sum of:
     0.16589169 = product of:
       0.59247035 = sum of:
         0.044355214 = weight(abstract_txt:search in 3320) [ClassicSimilarity], result of:
           0.044355214 = score(doc=3320,freq=2.0), product of:
             0.09151423 = queryWeight, product of:
               1.2381942 = boost
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.020217622 = queryNorm
             0.48468107 = fieldWeight in 3320, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.6556938 = idf(docFreq=2971, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.08905905 = weight(abstract_txt:average in 3320) [ClassicSimilarity], result of:
           0.08905905 = score(doc=3320,freq=1.0), product of:
             0.1603087 = queryWeight, product of:
               1.3380655 = boost
               5.9258366 = idf(docFreq=306, maxDocs=42306)
               0.020217622 = queryNorm
             0.5555472 = fieldWeight in 3320, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.9258366 = idf(docFreq=306, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.014881135 = weight(abstract_txt:that in 3320) [ClassicSimilarity], result of:
           0.014881135 = score(doc=3320,freq=1.0), product of:
             0.06600484 = queryWeight, product of:
               1.3575528 = boost
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.020217622 = queryNorm
             0.2254552 = fieldWeight in 3320, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               2.4048555 = idf(docFreq=10381, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.1226133 = weight(abstract_txt:topics in 3320) [ClassicSimilarity], result of:
           0.1226133 = score(doc=3320,freq=2.0), product of:
             0.1802536 = queryWeight, product of:
               1.7377465 = boost
               5.1305914 = idf(docFreq=679, maxDocs=42306)
               0.020217622 = queryNorm
             0.6802267 = fieldWeight in 3320, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.1305914 = idf(docFreq=679, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.09354611 = weight(abstract_txt:database in 3320) [ClassicSimilarity], result of:
           0.09354611 = score(doc=3320,freq=2.0), product of:
             0.16564903 = queryWeight, product of:
               1.9235712 = boost
               4.259421 = idf(docFreq=1624, maxDocs=42306)
               0.020217622 = queryNorm
             0.56472474 = fieldWeight in 3320, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               4.259421 = idf(docFreq=1624, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.1512996 = weight(abstract_txt:indexing in 3320) [ClassicSimilarity], result of:
           0.1512996 = score(doc=3320,freq=3.0), product of:
             0.21478462 = queryWeight, product of:
               2.4488964 = boost
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.020217622 = queryNorm
             0.70442474 = fieldWeight in 3320, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.3381314 = idf(docFreq=1501, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
         0.076715924 = weight(abstract_txt:subject in 3320) [ClassicSimilarity], result of:
           0.076715924 = score(doc=3320,freq=1.0), product of:
             0.20931605 = queryWeight, product of:
               2.6482606 = boost
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.020217622 = queryNorm
             0.36650762 = fieldWeight in 3320, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.9094145 = idf(docFreq=2305, maxDocs=42306)
               0.09375 = fieldNorm(doc=3320)
       0.28 = coord(7/25)