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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) 0.05 
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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

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