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  1. Midorikawa, N.: Is the synthetic expression method of the Dewey Decimal Classification an effective device for treating complex subjects? (1997) 0.02 
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  2. Takeda, N.: Problems in hierarchical structures in thesauri : their influences on the results of information retrieval (1994) 0.02 
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  3. Hosono, K.: Information retrieval functions in digital libraries (1996) 0.02 
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    Abstract
    Information retrieval functions in digital libraries have a different context from those which apply to searching commercial databases or OPACs. Different methods of browsing in this context are described, but the retrieval function should also include ordinary Boolean searching. Conversion of printed materials to electronic format using OCR can result in errors, which may cause problems for keyword searching. The n-gram method of approximate or fuzzy matching to reduce this problem is described
  4. Mirorikawa, N.: Structures of classification systems : hierarchical and multidimensional (1996) 0.02 
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  5. Midorikawa, N.: ¬A discussion of the concepts of facets from the viewpoint of the structures of classification systems (1997) 0.01 
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  6. 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

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