Search (1 results, page 1 of 1)

7.323784E-4 = product of:
  0.0051266486 = sum of:
    0.0051266486 = product of:
      0.025633242 = sum of:
        0.025633242 = weight(_text_:retrieval in 3853) [ClassicSimilarity], result of:
          0.025633242 = score(doc=3853,freq=2.0), product of:
            0.109568894 = queryWeight, product of:
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.03622214 = queryNorm
            0.23394634 = fieldWeight in 3853, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              3.024915 = idf(docFreq=5836, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3853)
      0.2 = coord(1/5)
  0.14285715 = coord(1/7)

Abstract

Considers 2 non-Boolean searching systems available on commercial online systems. QUESTQUORUM, based on coordination level searching, was introduced by ESA/IRS in Dec. 85. TARGET, which employs partial match probabilistic retrieval was introduced by DIALOG in Dec 93. 6 subject searches were carried out on databases available on both Dialog and ESA/IRS to compare TARGET and QUESTQUORUM with Boolean searching. Outlines the main advantages of these tools, and their disadvantages. Suggests when their use may be preferable