Discussion
Which of the following are the salient features of UDC IME ?
(i) Main class 4 is vacant
(ii) More suitable to micro documents
(iii) Minimum three digits in class number
(iv) Notation is independent of any language scripts
Answer: A
The answer is (i), (ii) and (iv) are correct.
In the Universal Decimal Classification main class 4 has been vacant since language was moved into class 8. UDC was designed for indexing articles and other micro documents in detail, not only whole books. Its notation of Arabic numerals and symbols works the same in any language or script, which is why it is used internationally.
A minimum of three digits in the class number is a feature of the Dewey Decimal Classification, not UDC, so options containing (iii) are wrong.
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