Universal Decimal Classification

The Universal Decimal Classification (UDC) is an influential bibliographic and library classification system designed to systematically arrange all branches of human knowledge. Developed as an analytico-synthetic and faceted classification system, the UDC facilitates powerful content indexing and information retrieval in extensive collections.

Historical Context

The inception of the UDC can be traced back to 1895, a time when the need for a comprehensive catalog of published information became evident. The visionary behind this effort was the Belgian intellectual Paul Otlet, a pivotal figure in the early development of information science. Alongside Henri La Fontaine, Otlet embarked on creating the Universal Bibliographic Repertory, intended to serve as an extensive classified index of global publications.

The concept of employing a classification system was inspired by the Dewey Decimal Classification (DDC), developed by Melvil Dewey. Otlet, recognizing the potential of the DDC, sought and obtained permission to translate it into French, which laid the foundation for the UDC.

Structure and Features

The UDC's structure is distinguished by its detailed vocabulary and syntax, making it notably versatile and dynamic. Unlike the DDC, which primarily utilizes a single numerical system, the UDC's faceted approach allows for the combination of subjects through various notations, creating a more nuanced and comprehensive classification. This capability is particularly beneficial in representing complex subjects within scientific disciplines and interdisciplinary studies.

Faceted Classification

A key component of the UDC is its faceted classification, which permits the separation of subjects into discrete, combinable categories. This system allows librarians and researchers to create specific notations that can reflect the unique attributes of a subject matter, providing a tailored approach to categorization.

Multilingualism

The UDC is also distinct for its multilingual capabilities, allowing for the classification system to be applied across different languages, thereby fostering international collaboration and understanding in library sciences.

Applications

The Universal Decimal Classification is widely adopted in libraries and information centers around the world, although its use may vary depending on regional preferences. It is particularly valued in institutions requiring detailed and precise classification of specialized subjects, such as technical libraries and research institutions.

Related Topics

• Library Classification
• Faceted Classification
• Library of Congress Classification
• Nippon Decimal Classification
• Korean Decimal Classification

The UDC remains a cornerstone in the field of library science, demonstrating the power of a well-structured classification system to enhance the accessibility and organization of the world's knowledge.