Document (#23701)

Author

Schwartz, C.

Title

Web search engines

Source

Journal of the American Society for Information Science. 49(1998) no.11, S.973-982

Year

1998

Abstract

This reviews looks briefly at the history of WWW search engine development, considers the current state of affairs, and reflects on the future. Networked discovery tools have evolved along with Internet resource availability. WWW search engines display some complexity in their variety, content, resource acquisition strategies, and in the array of tools the deploy to assist users. A small but growing body of evaluation literature, much of it not systematic in nature, indicates that performance effectiveness is difficult to assess in this setting. Significant improvements in general-content search engine retrieval and ranking performance may not be possible, and are probalby not worth the effort, although search engine providers have introduced some rudimentary attempts at personalization, summarization, and query expansion. The shift to distributed search across multitype database systems could extend general networked discovery and retrieval to include smaller resource collections with rich metadata and navigation tools

Theme

Suchmaschinen
Semantisches Umfeld in Indexierung u. Retrieval

Similar documents (author)

1. Schwartz, J.: ¬A new classification and notation (1882) 5.07

   5.073718 = sum of:
     5.073718 = weight(author_txt:schwartz in 819) [ClassicSimilarity], result of:
       5.073718 = fieldWeight in 819, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.117949 = idf(docFreq=35, maxDocs=44421)
         0.625 = fieldNorm(doc=819)
   

2. Schwartz, W.: Digitalisierung von Büchern : zwei amerikanische Projekte (1992) 5.07

   5.073718 = sum of:
     5.073718 = weight(author_txt:schwartz in 3177) [ClassicSimilarity], result of:
       5.073718 = fieldWeight in 3177, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.117949 = idf(docFreq=35, maxDocs=44421)
         0.625 = fieldNorm(doc=3177)
   

3. Schwartz, C.: Evaluating CD-ROM products : yet another checklist (1993) 5.07

   5.073718 = sum of:
     5.073718 = weight(author_txt:schwartz in 3749) [ClassicSimilarity], result of:
       5.073718 = fieldWeight in 3749, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.117949 = idf(docFreq=35, maxDocs=44421)
         0.625 = fieldNorm(doc=3749)
   

4. Schwartz, C.: Trends in interface design in the CD-ROM database environment (1989) 5.07

   5.073718 = sum of:
     5.073718 = weight(author_txt:schwartz in 4018) [ClassicSimilarity], result of:
       5.073718 = fieldWeight in 4018, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.117949 = idf(docFreq=35, maxDocs=44421)
         0.625 = fieldNorm(doc=4018)
   

5. Schwartz, C.: ¬The CD-ROM journal literature : where do you look? (1992) 5.07

   5.073718 = sum of:
     5.073718 = weight(author_txt:schwartz in 4856) [ClassicSimilarity], result of:
       5.073718 = fieldWeight in 4856, product of:
         1.0 = tf(freq=1.0), with freq of:
           1.0 = termFreq=1.0
         8.117949 = idf(docFreq=35, maxDocs=44421)
         0.625 = fieldNorm(doc=4856)
   

Similar documents (content)

1. Vaughan, L.: New measurements for search engine evaluation proposed and tested (2004) 0.20

   0.1977726 = sum of:
     0.1977726 = product of:
       0.8240526 = sum of:
         0.03811905 = weight(abstract_txt:retrieval in 3535) [ClassicSimilarity], result of:
           0.03811905 = score(doc=3535,freq=2.0), product of:
             0.082701534 = queryWeight, product of:
               1.0833148 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.021959208 = queryNorm
             0.46092314 = fieldWeight in 3535, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
         0.03193285 = weight(abstract_txt:some in 3535) [ClassicSimilarity], result of:
           0.03193285 = score(doc=3535,freq=1.0), product of:
             0.09259495 = queryWeight, product of:
               1.1462822 = boost
               3.6785707 = idf(docFreq=3049, maxDocs=44421)
               0.021959208 = queryNorm
             0.344866 = fieldWeight in 3535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6785707 = idf(docFreq=3049, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
         0.12649937 = weight(abstract_txt:performance in 3535) [ClassicSimilarity], result of:
           0.12649937 = score(doc=3535,freq=4.0), product of:
             0.14603864 = queryWeight, product of:
               1.4395666 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.021959208 = queryNorm
             0.86620486 = fieldWeight in 3535, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
         0.09494695 = weight(abstract_txt:engines in 3535) [ClassicSimilarity], result of:
           0.09494695 = score(doc=3535,freq=1.0), product of:
             0.19146211 = queryWeight, product of:
               1.6483116 = boost
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.021959208 = queryNorm
             0.49590462 = fieldWeight in 3535, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
         0.322503 = weight(abstract_txt:engine in 3535) [ClassicSimilarity], result of:
           0.322503 = score(doc=3535,freq=4.0), product of:
             0.3119812 = queryWeight, product of:
               2.5769603 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.021959208 = queryNorm
             1.0337257 = fieldWeight in 3535, product of:
               2.0 = tf(freq=4.0), with freq of:
                 4.0 = termFreq=4.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
         0.21005133 = weight(abstract_txt:search in 3535) [ClassicSimilarity], result of:
           0.21005133 = score(doc=3535,freq=5.0), product of:
             0.27417606 = queryWeight, product of:
               3.416436 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.021959208 = queryNorm
             0.7661184 = fieldWeight in 3535, product of:
               2.236068 = tf(freq=5.0), with freq of:
                 5.0 = termFreq=5.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.09375 = fieldNorm(doc=3535)
       0.24 = coord(6/25)
   

2. Poulter, A.: ¬The design of World Wide Web search engines : a critical review (1997) 0.20

   0.19561519 = sum of:
     0.19561519 = product of:
       0.6986257 = sum of:
         0.017969493 = weight(abstract_txt:retrieval in 156) [ClassicSimilarity], result of:
           0.017969493 = score(doc=156,freq=1.0), product of:
             0.082701534 = queryWeight, product of:
               1.0833148 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.021959208 = queryNorm
             0.21728125 = fieldWeight in 156, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.031225964 = weight(abstract_txt:content in 156) [ClassicSimilarity], result of:
           0.031225964 = score(doc=156,freq=1.0), product of:
             0.11953642 = queryWeight, product of:
               1.3024108 = boost
               4.1796083 = idf(docFreq=1847, maxDocs=44421)
               0.021959208 = queryNorm
             0.26122552 = fieldWeight in 156, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.1796083 = idf(docFreq=1847, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.03476437 = weight(abstract_txt:general in 156) [ClassicSimilarity], result of:
           0.03476437 = score(doc=156,freq=1.0), product of:
             0.12840421 = queryWeight, product of:
               1.3498563 = boost
               4.3318667 = idf(docFreq=1586, maxDocs=44421)
               0.021959208 = queryNorm
             0.27074167 = fieldWeight in 156, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.3318667 = idf(docFreq=1586, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.15504773 = weight(abstract_txt:engines in 156) [ClassicSimilarity], result of:
           0.15504773 = score(doc=156,freq=6.0), product of:
             0.19146211 = queryWeight, product of:
               1.6483116 = boost
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.021959208 = queryNorm
             0.8098089 = fieldWeight in 156, product of:
               2.4494898 = tf(freq=6.0), with freq of:
                 6.0 = termFreq=6.0
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.05648085 = weight(abstract_txt:tools in 156) [ClassicSimilarity], result of:
           0.05648085 = score(doc=156,freq=1.0), product of:
             0.20313632 = queryWeight, product of:
               2.0793965 = boost
               4.448705 = idf(docFreq=1411, maxDocs=44421)
               0.021959208 = queryNorm
             0.27804407 = fieldWeight in 156, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.448705 = idf(docFreq=1411, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.18619718 = weight(abstract_txt:engine in 156) [ClassicSimilarity], result of:
           0.18619718 = score(doc=156,freq=3.0), product of:
             0.3119812 = queryWeight, product of:
               2.5769603 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.021959208 = queryNorm
             0.5968218 = fieldWeight in 156, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
         0.21694008 = weight(abstract_txt:search in 156) [ClassicSimilarity], result of:
           0.21694008 = score(doc=156,freq=12.0), product of:
             0.27417606 = queryWeight, product of:
               3.416436 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.021959208 = queryNorm
             0.7912437 = fieldWeight in 156, product of:
               3.4641016 = tf(freq=12.0), with freq of:
                 12.0 = termFreq=12.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=156)
       0.28 = coord(7/25)
   

3. Jörgensen, C.: ¬The MPEG-7 standard : multimedia description in theory and application (2007) 0.17

   0.17095688 = sum of:
     0.17095688 = product of:
       0.53424025 = sum of:
         0.015723307 = weight(abstract_txt:retrieval in 1472) [ClassicSimilarity], result of:
           0.015723307 = score(doc=1472,freq=1.0), product of:
             0.082701534 = queryWeight, product of:
               1.0833148 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.021959208 = queryNorm
             0.1901211 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.047324337 = weight(abstract_txt:content in 1472) [ClassicSimilarity], result of:
           0.047324337 = score(doc=1472,freq=3.0), product of:
             0.11953642 = queryWeight, product of:
               1.3024108 = boost
               4.1796083 = idf(docFreq=1847, maxDocs=44421)
               0.021959208 = queryNorm
             0.39589888 = fieldWeight in 1472, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.1796083 = idf(docFreq=1847, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.14270177 = weight(abstract_txt:rudimentary in 1472) [ClassicSimilarity], result of:
           0.14270177 = score(doc=1472,freq=1.0), product of:
             0.28560156 = queryWeight, product of:
               1.4235187 = boost
               9.1365185 = idf(docFreq=12, maxDocs=44421)
               0.021959208 = queryNorm
             0.49965334 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               9.1365185 = idf(docFreq=12, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.06631673 = weight(abstract_txt:discovery in 1472) [ClassicSimilarity], result of:
           0.06631673 = score(doc=1472,freq=1.0), product of:
             0.21589026 = queryWeight, product of:
               1.7503077 = boost
               5.616968 = idf(docFreq=438, maxDocs=44421)
               0.021959208 = queryNorm
             0.30717796 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               5.616968 = idf(docFreq=438, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.08832506 = weight(abstract_txt:networked in 1472) [ClassicSimilarity], result of:
           0.08832506 = score(doc=1472,freq=1.0), product of:
             0.26134065 = queryWeight, product of:
               1.9257565 = boost
               6.1800065 = idf(docFreq=249, maxDocs=44421)
               0.021959208 = queryNorm
             0.3379691 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               6.1800065 = idf(docFreq=249, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.049420744 = weight(abstract_txt:tools in 1472) [ClassicSimilarity], result of:
           0.049420744 = score(doc=1472,freq=1.0), product of:
             0.20313632 = queryWeight, product of:
               2.0793965 = boost
               4.448705 = idf(docFreq=1411, maxDocs=44421)
               0.021959208 = queryNorm
             0.24328856 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.448705 = idf(docFreq=1411, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.06963124 = weight(abstract_txt:resource in 1472) [ClassicSimilarity], result of:
           0.06963124 = score(doc=1472,freq=1.0), product of:
             0.25530002 = queryWeight, product of:
               2.3311431 = boost
               4.987297 = idf(docFreq=823, maxDocs=44421)
               0.021959208 = queryNorm
             0.2727428 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.987297 = idf(docFreq=823, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
         0.054797053 = weight(abstract_txt:search in 1472) [ClassicSimilarity], result of:
           0.054797053 = score(doc=1472,freq=1.0), product of:
             0.27417606 = queryWeight, product of:
               3.416436 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.021959208 = queryNorm
             0.19986083 = fieldWeight in 1472, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1472)
       0.32 = coord(8/25)
   

4. Spink, A.; Jansen, B.J.; Blakely, C.; Koshman, S.: ¬A study of results overlap and uniqueness among major Web search engines (2006) 0.16

   0.1639846 = sum of:
     0.1639846 = product of:
       0.68326914 = sum of:
         0.015723307 = weight(abstract_txt:retrieval in 1993) [ClassicSimilarity], result of:
           0.015723307 = score(doc=1993,freq=1.0), product of:
             0.082701534 = queryWeight, product of:
               1.0833148 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.021959208 = queryNorm
             0.1901211 = fieldWeight in 1993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
         0.06445602 = weight(abstract_txt:smaller in 1993) [ClassicSimilarity], result of:
           0.06445602 = score(doc=1993,freq=1.0), product of:
             0.16813186 = queryWeight, product of:
               1.0922143 = boost
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.021959208 = queryNorm
             0.38336593 = fieldWeight in 1993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               7.01012 = idf(docFreq=108, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
         0.03689565 = weight(abstract_txt:performance in 1993) [ClassicSimilarity], result of:
           0.03689565 = score(doc=1993,freq=1.0), product of:
             0.14603864 = queryWeight, product of:
               1.4395666 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.021959208 = queryNorm
             0.25264308 = fieldWeight in 1993, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
         0.20723441 = weight(abstract_txt:engines in 1993) [ClassicSimilarity], result of:
           0.20723441 = score(doc=1993,freq=14.0), product of:
             0.19146211 = queryWeight, product of:
               1.6483116 = boost
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.021959208 = queryNorm
             1.0823781 = fieldWeight in 1993, product of:
               3.7416575 = tf(freq=14.0), with freq of:
                 14.0 = termFreq=14.0
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
         0.13302569 = weight(abstract_txt:engine in 1993) [ClassicSimilarity], result of:
           0.13302569 = score(doc=1993,freq=2.0), product of:
             0.3119812 = queryWeight, product of:
               2.5769603 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.021959208 = queryNorm
             0.42639008 = fieldWeight in 1993, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
         0.22593404 = weight(abstract_txt:search in 1993) [ClassicSimilarity], result of:
           0.22593404 = score(doc=1993,freq=17.0), product of:
             0.27417606 = queryWeight, product of:
               3.416436 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.021959208 = queryNorm
             0.8240473 = fieldWeight in 1993, product of:
               4.1231055 = tf(freq=17.0), with freq of:
                 17.0 = termFreq=17.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0546875 = fieldNorm(doc=1993)
       0.24 = coord(6/25)
   

5. Yilmaz, T.; Ozcan, R.; Altingovde, I.S.; Ulusoy, Ö.: Improving educational web search for question-like queries through subject classification (2019) 0.16

   0.16325201 = sum of:
     0.16325201 = product of:
       0.5830429 = sum of:
         0.017969493 = weight(abstract_txt:retrieval in 41) [ClassicSimilarity], result of:
           0.017969493 = score(doc=41,freq=1.0), product of:
             0.082701534 = queryWeight, product of:
               1.0833148 = boost
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.021959208 = queryNorm
             0.21728125 = fieldWeight in 41, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.4765 = idf(docFreq=3732, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.021288568 = weight(abstract_txt:some in 41) [ClassicSimilarity], result of:
           0.021288568 = score(doc=41,freq=1.0), product of:
             0.09259495 = queryWeight, product of:
               1.1462822 = boost
               3.6785707 = idf(docFreq=3049, maxDocs=44421)
               0.021959208 = queryNorm
             0.22991067 = fieldWeight in 41, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               3.6785707 = idf(docFreq=3049, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.060213655 = weight(abstract_txt:general in 41) [ClassicSimilarity], result of:
           0.060213655 = score(doc=41,freq=3.0), product of:
             0.12840421 = queryWeight, product of:
               1.3498563 = boost
               4.3318667 = idf(docFreq=1586, maxDocs=44421)
               0.021959208 = queryNorm
             0.46893832 = fieldWeight in 41, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               4.3318667 = idf(docFreq=1586, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.042166457 = weight(abstract_txt:performance in 41) [ClassicSimilarity], result of:
           0.042166457 = score(doc=41,freq=1.0), product of:
             0.14603864 = queryWeight, product of:
               1.4395666 = boost
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.021959208 = queryNorm
             0.28873494 = fieldWeight in 41, product of:
               1.0 = tf(freq=1.0), with freq of:
                 1.0 = termFreq=1.0
               4.619759 = idf(docFreq=1189, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.08951684 = weight(abstract_txt:engines in 41) [ClassicSimilarity], result of:
           0.08951684 = score(doc=41,freq=2.0), product of:
             0.19146211 = queryWeight, product of:
               1.6483116 = boost
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.021959208 = queryNorm
             0.46754336 = fieldWeight in 41, product of:
               1.4142135 = tf(freq=2.0), with freq of:
                 2.0 = termFreq=2.0
               5.2896495 = idf(docFreq=608, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.18619718 = weight(abstract_txt:engine in 41) [ClassicSimilarity], result of:
           0.18619718 = score(doc=41,freq=3.0), product of:
             0.3119812 = queryWeight, product of:
               2.5769603 = boost
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.021959208 = queryNorm
             0.5968218 = fieldWeight in 41, product of:
               1.7320508 = tf(freq=3.0), with freq of:
                 3.0 = termFreq=3.0
               5.5132036 = idf(docFreq=486, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
         0.1656907 = weight(abstract_txt:search in 41) [ClassicSimilarity], result of:
           0.1656907 = score(doc=41,freq=7.0), product of:
             0.27417606 = queryWeight, product of:
               3.416436 = boost
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.021959208 = queryNorm
             0.6043223 = fieldWeight in 41, product of:
               2.6457512 = tf(freq=7.0), with freq of:
                 7.0 = termFreq=7.0
               3.654598 = idf(docFreq=3123, maxDocs=44421)
               0.0625 = fieldNorm(doc=41)
       0.28 = coord(7/25)