Search (2 results, page 1 of 1)

  • × author_ss:"Barker, A.L."
  • × language_ss:"e"
  • × theme_ss:"Retrievalsprachen"
  • × year_i:[1990 TO 2000}
  1. Barker, A.L.: DataStar Web : a comparison with 'classic' DataStar command language searching (1998) 0.00
    0.003943022 = product of:
      0.02365813 = sum of:
        0.02365813 = product of:
          0.04731626 = sum of:
            0.04731626 = weight(_text_:22 in 7691) [ClassicSimilarity], result of:
              0.04731626 = score(doc=7691,freq=2.0), product of:
                0.15286934 = queryWeight, product of:
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.043654136 = queryNorm
                0.30952093 = fieldWeight in 7691, product of:
                  1.4142135 = tf(freq=2.0), with freq of:
                    2.0 = termFreq=2.0
                  3.5018296 = idf(docFreq=3622, maxDocs=44218)
                  0.0625 = fieldNorm(doc=7691)
          0.5 = coord(1/2)
      0.16666667 = coord(1/6)
    
    Source
    Online and CD-ROM review. 22(1998) no.3, S.155-167
  2. Barker, A.L.: Non-Boolean searching on commercial online systems : optimising use of Dialog TARGET and ESA/IRS QUESTQUORUM (1995) 0.00
    0.0014724231 = product of:
      0.008834538 = sum of:
        0.008834538 = weight(_text_:in in 3853) [ClassicSimilarity], result of:
          0.008834538 = score(doc=3853,freq=4.0), product of:
            0.059380736 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.043654136 = queryNorm
            0.14877784 = fieldWeight in 3853, product of:
              2.0 = tf(freq=4.0), with freq of:
                4.0 = termFreq=4.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.0546875 = fieldNorm(doc=3853)
      0.16666667 = coord(1/6)
    
    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