Search (1 results, page 1 of 1)

  • × author_ss:"Fidel, R."
  • × theme_ss:"Referieren"
  1. Fidel, R.: Writing abstracts for free-text searching (1986) 0.00
    5.575784E-4 = product of:
      0.008363675 = sum of:
        0.006110009 = weight(_text_:in in 684) [ClassicSimilarity], result of:
          0.006110009 = score(doc=684,freq=6.0), product of:
            0.029340398 = queryWeight, product of:
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.021569785 = queryNorm
            0.2082456 = fieldWeight in 684, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              1.3602545 = idf(docFreq=30841, maxDocs=44218)
              0.0625 = fieldNorm(doc=684)
        0.002253667 = weight(_text_:s in 684) [ClassicSimilarity], result of:
          0.002253667 = score(doc=684,freq=2.0), product of:
            0.023451481 = queryWeight, product of:
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.021569785 = queryNorm
            0.09609913 = fieldWeight in 684, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.0872376 = idf(docFreq=40523, maxDocs=44218)
              0.0625 = fieldNorm(doc=684)
      0.06666667 = coord(2/30)
    
    Abstract
    A survey of abstracting policies by producers of bibliographical databases examined abstracting guidelines which aim to enhance free- text retrieval. Of the 123 database policies examined, fifty-seven (46 per cent) included such instructions. Editors consider contents of abstracts and their language as a primary factor in retrieval enhancement. Most recommend that once abstractors decide which concepts to include in abstracts and in which form to represent them, these terms should be co-ordinated with index terms assigned from a controlled vocabulary. Guidelines about the type of abstracts, i.e., informative or indicative, and about their length are not affected by the capability of free-text retrieval
    Source
    Journal of documentation. 42(1986), S.11-21