Ranganathan's Classification Schemes

S.R. Ranganathan, a prominent Indian mathematician and library scientist, is widely regarded as the father of library science in India. He developed many concepts crucial to modern library classification, including his famous Five Laws of Library Science and the Colon Classification system. His work revolutionized how libraries organize information, moving beyond rigid, pre-defined systems.

Enumerative Classification Explained

The question refers to a specific type of classification scheme that S.R. Ranganathan described. Let's break down the characteristics mentioned in the quote: "______ scheme for classification consists essentially of a single schedule enumerating all subjects of the past, the present and the anticipatable future".

• Single Schedule: This implies that all subjects, from broad categories to very specific topics, are listed in one comprehensive list. There isn't a separation into different facets or aspects that can be combined.
• Enumerating All Subjects: This means the scheme attempts to list every possible subject that has existed, currently exists, or is expected to exist. This pre-enumeration is a defining characteristic.
• Past, Present, and Anticipatable Future: The scheme tries to be exhaustive by including subjects from all timeframes, requiring the creator to foresee future knowledge areas.

These characteristics perfectly describe an enumerative classification scheme. In such a scheme, every specific subject is assigned a unique, pre-defined class number in a fixed order. Librarians simply choose the number that most closely matches the subject of the document they are classifying.

Characteristics of Enumerative Classification

Here are some key characteristics of an enumerative classification scheme:

• Pre-Coordinated: The relationships between subjects are decided beforehand by the scheme's designer. Users don't combine elements to form new subject numbers.
• Rigid Structure: Due to its pre-defined nature, it can be challenging to incorporate new subjects or interdisciplinary topics that emerge after the scheme is published without major revisions.
• Simplicity for Users: For classifiers, it can be straightforward as they just need to locate the exact subject in the schedule.
• Example: The Dewey Decimal Classification (DDC) is often cited as a prime example of an enumerative scheme, although modern versions have incorporated some faceted elements to increase flexibility.

S.R. Ranganathan's own Colon Classification (CC) is a prime example of a faceted classification scheme, which he developed as an alternative to the limitations of enumerative systems. Faceted schemes allow for the construction of class numbers by combining components from different "facets" (like Personality, Matter, Energy, Space, Time), offering greater flexibility and hospitality to new subjects.

Therefore, when Ranganathan spoke of a scheme that uses a "single schedule" to list all subjects exhaustively, he was defining the essence of an enumerative classification scheme.