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  1. ueda, K.: Simplified plan for a new maintenance system for three tools : Basic subject Headings, Nippon Decimal classification, and Nippon Cataloguing Rules (2000) 0.04
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  2. Watanabe, T.: ¬An experimental OPAC system using NDC8 to improve subject access (1994) 0.03
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    Abstract
    Description of an attempt to improve OPAC subject access at Kobe University Library using Nippon Decimal Classification, 8th ed. (NDC8). Examines the theoretical aspects of using a classification for subject searching, then explains the Kobe system. Using the NDC8 machine-readable data file, a database was created for the OPAC, incorporating class numbers and subject headings. Difficulties arise from subdivisions and the structure of NDC8 itself, but it is an important area for development
  3. Klein, R.D.: ¬The problem of cataloguing world literature using the Nippon Decimal Classification (1994) 0.01
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    Abstract
    The Nippon Decimal Classification (NDC) system, extensively used in Japanese libraries, was devised in 1929. It is difficult to use NDC to classify world literature, such as fiction in English by non American, non British writers. This is not necessarily straightforward in other classification schemes but a survey of 40 Japanese university libraries, of which 24 responded, showed remarkable inconsistencies in the treatment of 22 world literature authors. NDC clearly needs updating to deal with this problem