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0.022583602 = product of:
  0.09033441 = sum of:
    0.09033441 = weight(_text_:engines in 98) [ClassicSimilarity], result of:
      0.09033441 = score(doc=98,freq=4.0), product of:
        0.22757743 = queryWeight, product of:
          5.080822 = idf(docFreq=746, maxDocs=44218)
          0.04479146 = queryNorm
        0.39693922 = fieldWeight in 98, product of:
          2.0 = tf(freq=4.0), with freq of:
            4.0 = termFreq=4.0
          5.080822 = idf(docFreq=746, maxDocs=44218)
          0.0390625 = fieldNorm(doc=98)
  0.25 = coord(1/4)

Footnote

Vgl.: http://www.igi-global.com/book/next-generation-search-engines/64422.

Source

Next generation search engines: advanced models for information retrieval. Eds.: C. Jouis, u.a