Search (1 results, page 1 of 1)

  • × author_ss:"Walker, S."
  • × theme_ss:"OPAC"
  • × theme_ss:"Semantisches Umfeld in Indexierung u. Retrieval"
  1. Walker, S.: Subject access in online catalogues (1991) 0.08
    0.08352602 = product of:
      0.16705205 = sum of:
        0.013732546 = weight(_text_:information in 5690) [ClassicSimilarity], result of:
          0.013732546 = score(doc=5690,freq=2.0), product of:
            0.08850355 = queryWeight, product of:
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.050415643 = queryNorm
            0.1551638 = fieldWeight in 5690, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              1.7554779 = idf(docFreq=20772, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
        0.1533195 = weight(_text_:standards in 5690) [ClassicSimilarity], result of:
          0.1533195 = score(doc=5690,freq=6.0), product of:
            0.22470023 = queryWeight, product of:
              4.4569545 = idf(docFreq=1393, maxDocs=44218)
              0.050415643 = queryNorm
            0.68232906 = fieldWeight in 5690, product of:
              2.4494898 = tf(freq=6.0), with freq of:
                6.0 = termFreq=6.0
              4.4569545 = idf(docFreq=1393, maxDocs=44218)
              0.0625 = fieldNorm(doc=5690)
      0.5 = coord(2/4)
    
    Abstract
    Discusses some of the methods of subject access to on-line catalohues (OPACs) and argues that none are entirley satisfactory. Describes 2 methods for improving subject access: best match searching; and automatic query expansion application and discusses their feasibility. Mentions emerging application standards for information retrieval and concludes that existing standards are incompatible with most methods for improving standards