The notations are symbols used to represent subjects in a classification system. In colon Classification mixed notation is used. It include;
23 Roman small letters - a to z (i,l and o are excluded)
10 Indo-Arabic numerals - 0 to 9
26 Roman Capital Letters - A to Z
Bracketed numbers ( Numbers in Parenthesis) - Part of a class number derived by subject device will be bracketed numbers. For example - for the subject 'Hindu Law' the class number is Z, (Q,2). here 'Z' is the number for Law, the Basic Class and (Q,2) is for Hindu Religion, the number has derived via
Indicator digits like * ” ← ) & ‘ . ; ,-= + → (
Empty Digit
To increase the capacity of an Array ( The classes having co-ordinate status) Colon Classification has introduced empty digits. Z, 0 (Zero) and 9 are used to represent empty digits. They has no semantic value but possessing ordinal value.
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