Universal Decimal Classification Standard Edition Volume 2 — Alphabetical index

Precise Access to UDC Class Numbers

This volume is the alphabetical key to the Universal Decimal Classification Standard Edition. It opens the full UDC schedule by subject term, giving classifiers, cataloguers, and information professionals a fast route to the correct notation.

What This Index Contains

The index covers principal divisions, common auxiliaries, and special auxiliaries from the UDC schedules. Entries are drawn from UDC descriptions and verbal examples, and are structured to provide the most specific class number available. Locators to common auxiliary tables are shown where relevant, making it easy to move from a natural-language term to its assigned notation.

How the Index Works

The arrangement is word-by-word alphabetical order. Qualifiers are used to distinguish identical terms in different contexts, homographs, and ambiguous meanings. Cross-references are intentionally minimized because entries point to the most specific level possible. Users should always verify context against the class number and, when in doubt, consult Volume 1 for the complete schedule.

Built for Practical Classification Work

• Direct lookup from subject term to UDC class number
• Clear handling of common auxiliaries and special auxiliaries
• Qualifiers that reduce ambiguity in complex subjects
• Updated to reflect the third edition of the Standard Edition

A Working Tool for Libraries and Databases

For collections classified by UDC, this index supports both cataloguing and retrieval. It helps staff and researchers locate the right notation without scanning the full schedules, saving time and improving consistency.