rule of zero

What is rule of zero?

rule of zero meaning in Information Science terminology / glossary / dictionary is:

In Dewey Decimal Classification (DDC), when two or more class numbers are found to be equally suitable for a work, the cataloger is instructed to avoid subdivisions beginning with zero if there is a choice between 0 and 1-9 in the same position in the notation and to avoid subdivisions beginning with 00 when there is a choice between 00 and 0.

 

reference: ABC-CLIO

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