The indexing technique based on chain procedure presupposes the classificatory base for its efficiency. Being decimal notational system. Universal Decimal Classification (UDC) inherits some of the limitations of Dewey Decimal Classification (DDC) in both the idea and verbal planes. Due to these inherent problems of UDC, when chain procedure is tried with UDC numbers, certain inconsistencies are found. Notational homonym, telescoping, missing links and lack of precision in terminology are the important problems in UDC. Discusses these problems with reference to chain procedure and suggests solutions.
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