Search (2 results, page 1 of 1)

0.014095282 = product of:
  0.028190564 = sum of:
    0.028190564 = product of:
      0.05638113 = sum of:
        0.05638113 = weight(_text_:network in 4307) [ClassicSimilarity], result of:
          0.05638113 = score(doc=4307,freq=2.0), product of:
            0.22917621 = queryWeight, product of:
              4.4533744 = idf(docFreq=1398, maxDocs=44218)
              0.05146125 = queryNorm
            0.2460165 = fieldWeight in 4307, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4533744 = idf(docFreq=1398, maxDocs=44218)
              0.0390625 = fieldNorm(doc=4307)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

The construction and updating of indexing languages depend on the organization of their hierarchical structures in order to determine the classification of related terms and, above all, to allow a constant updating of vocabulary, a condition for knowledge evolution. The elaboration of an indexing language for online catalogs of libraries' networks is important considering the diversity and specificity of knowledge areas. From this perspective, the present paper reports on the work of a team of catalogers and researchers engaged in the construction of a hierarchical structure of an indexing language for an online catalog of a university library's network. The work on hierarchical structures began by defining the categories and subcategories that form the indexing language macrostructure by using the parameters of the Library of Congress Subject Headings , the National Library Terminology and the Vocabulary of the University of São Paulo Library's system. Throughout the stages of the elaboration process of the macrostructure, difficulties and improvements were observed and discussed. The results enabled the assessment of the hierarchical structures of the languages used in the organization of the superordinate and subordinate terms, which has contributed to the systematization of operational procedures contained in an indexing language manual for online catalogs of libraries.

0.014095282 = product of:
  0.028190564 = sum of:
    0.028190564 = product of:
      0.05638113 = sum of:
        0.05638113 = weight(_text_:network in 5567) [ClassicSimilarity], result of:
          0.05638113 = score(doc=5567,freq=2.0), product of:
            0.22917621 = queryWeight, product of:
              4.4533744 = idf(docFreq=1398, maxDocs=44218)
              0.05146125 = queryNorm
            0.2460165 = fieldWeight in 5567, product of:
              1.4142135 = tf(freq=2.0), with freq of:
                2.0 = termFreq=2.0
              4.4533744 = idf(docFreq=1398, maxDocs=44218)
              0.0390625 = fieldNorm(doc=5567)
      0.5 = coord(1/2)
  0.5 = coord(1/2)

Abstract

Subject searching is difficult with traditional text-based online public access library catalogues (OPACs), and the next-generation discovery layers are keyword searching and result filtering tools that offer little support for subject browsing. Next-generation OPACs ignore the rich network of relations offered by controlled subject vocabulary, which can facilitate subject browsing. A new generation of OPACs could leverage existing information-organization investments and offer online searchers a novel browsing and searching environment. This is a case study of the design and development of a virtual reality subject browsing and information retrieval tool. The functional prototype shows that the Library of Congress subject headings (LCSH) can be shaped into a useful and usable tree structure serving as a visual metaphor that contains a real world collection from the domain of science and engineering. Formative tests show that users can effectively browse the LCSH tree and carve it up based on their keyword search queries. This study uses a complex information-organization structure as a defining characteristic of an OPAC that goes beyond the standard keyword search model, toward the cutting edge of online search tools.