Statement Analysis: Universal Decimal Classification (UDC)

Let's evaluate each statement regarding the Universal Decimal Classification (UDC) scheme:

• Statement a: It is a faceted classification scheme. This statement is considered correct. While UDC is an expansion of Dewey Decimal Classification, it incorporates synthetic principles, allowing for the combination of numbers to represent complex subjects, giving it faceted characteristics.
• Statement b: Paul Otlet and Henry La Fontaine are associated with it. This statement is correct. Paul Otlet and Henry La Fontaine are the principal developers of the UDC, adapting and expanding upon Melvil Dewey's classification system.
• Statement c: It has a relative index. This statement is considered incorrect. The UDC primarily uses an alphabetical index, unlike the DDC's relative index which shows subjects in relation to each other.
• Statement d: It uses pure notation. This statement is incorrect. UDC employs mixed notation, combining Arabic numerals with various symbols (e.g., '+', '/', ':') to represent relationships and concepts. Pure notation typically refers to a single type of character, like only numerals.

Conclusion on UDC Statements

Based on the analysis, statements 'a' and 'b' are correct descriptions related to the Universal Decimal Classification.