UDC Table Kinds Explained

The Universal Decimal Classification (UDC) is a system developed for organizing documents and information based on subject. It's used extensively in libraries and documentation centers worldwide. To achieve detailed and standardized subject description, UDC utilizes various components, including specific sets of numbers known as 'tables' or 'auxiliaries'.

Identifying the Five Kinds of UDC Tables

Within the UDC system, there are commonly recognized five main categories of auxiliary tables. These tables are crucial for adding specific details to the main classification numbers, ensuring consistency and precision.

• Place Auxiliaries: These tables specify geographical locations. They are used to indicate where an event occurred, where a subject is studied, or the geographical scope of a document. For example, numbers representing continents, countries, or cities fall under this category.
• Time Auxiliaries: These tables are used to denote dates, periods, or historical eras. They help classify information related to specific times, such as seasons, years, decades, or historical epochs.
• Language Auxiliaries: This category helps specify the language of a document or the language being discussed. Typically represented using codes like '=0' followed by a specific language number.
• Form Auxiliaries: These tables define the specific form or presentation of a document, regardless of its subject matter. Examples include dictionaries (-01), encyclopedias (-02), periodicals (-04), or patents.
• Race, Nationality, and People Auxiliaries: This set of tables is used for classifying subjects related to specific ethnic groups, nationalities, or peoples. They often use the '=' sign followed by specific codes to denote these groups.

Understanding these five kinds of UDC tables is essential for accurately classifying and retrieving information within the Universal Decimal Classification system.