Universal Decimal Classification Online

** UPDATE **

22 July 2013

BSI and UDC Consortium announce UDC Online replacement service

English speaking users of UDC will be able to access a new UDC Consortium's UDC Online service from 26 August as BSI’s UDC Online will be closing from 1 October 2013. The upgraded UDC Online service offers improved searching and browsing functions and several new features such as access to cancelled numbers and alphabetical chain index.

The new product is a part of the multilingual UDC hub-service driven directly from the UDC Master Reference File (MRF) database and run by the UDC Consortium (The Hague). The new online service has been developed to bring together and align existing translations with the regularly updated knowledge content of the UDC. The tool aims to provide a better, up-to-date and more convenient service for users world-wide. The English version will be the first edition to be made available online.

The UDC was created in 1900s and it has since been used in over 150,000 libraries and other information services in over 130 countries. It is one of the most sophisticated and most widely used knowledge organization schemes in the world.

BSI, the business standards company is a global independent business services organization that inspires confidence and delivers assurance to over 70,000 customers in 150 countries with standards-based solutions. BSI has been the principal publisher of UDC schedules in English since the 1930s and a member of the UDC Consortium from 1992-2012. BSI's expert input into the UDC development for over 70 years has been invaluable for UDC users in many countries.

High quality printed BSI UDC editions are appreciated by documentation specialists worldwide. In spring 2001, BSI released a web version of the English UDC schedules called "UDC Online" - the first of its kind in the bibliographic domain. BSI UDC Online was at the forefront of online classification schemes and has been serving users for over 10 years.


Universal Decimal Classification Online
UDC Online is the complete edition of UDC with additional functionality. Originally intended for organizing documentation on everything that had ever been written, UDC has exceeded its parent, the Dewey Decimal Classification, both in the size of its vocabulary and its indexing capabilities.

It was produced and researched in association and with representation from the following industry experts:

  • CILIP (Chartered Institution of Library and Information Professionals)
  • National Information Services and Systems (NISS)
  • Society of Indexers
  • Standing Conference of National and University Libraries.

Derived from the Master Reference File (MRF) from the UDC Consortium, UDC Online contains all available references and classification and has over 65,000 entries.

UDC Online has been given a complete overhaul by BSI and is now owned and run by us.

The UDC consortia now holds over 2000 sample UDC numbers, extracted from the main reference file. To view them just visit the UDC consortia site.

To order online:

  • Go to www.UDConline.net
  • Click on the "subscribe now" button
  • Subscribe directly using your cred/debit card

Subscribe to UDC Online now

Price: £395* + VAT
(£50** + VAT p.a. for each additional user)

Find out more / Make an enquiry

*This price entitles one user (1-2 users /1 site) to unlimited use of BSI  UDC Online for one year to be used to assess the subscribing organization only.

** For multi-user and enterprise pricing contact our dedicated sales team on:
+44 (0) 20 8996 7555


What can UDC Online do for you?
A highly flexible and effective system for organizing bibliographic records for all kinds of information in any medium including organizing and recording books, bibliographic records, information resources and even objects such as stamps and coins.

UDC Online is an enhanced version of the Complete Edition. The enhanced functionality includes:

  • Number building facility to help construct complex UDC numbers
  • Ability for multiple search strategies.

The Online version is available on a yearly subscription and is competitively priced.

Its main strength, however, is that it preserves a logical structure and works equally well whether it is used only at an abridged level or applied to its full extent.

UDC can be used for organizing and recording different kinds of objects, files, books or information resources. The scheme has been used to classify motion pictures by subject, map collections by place, and to catalogue collections of stamps, coins and metal soldiers.

Features of UDC Online
A one-year UDC Online subscription offers:

  • Complete content of UDC database
  • Number building facility helps you to construct complex UDC numbers and see the result developing on screen
  • Search and view online
  • Cut and paste functionality - save time and effort and avoid transcription errors
  • User-friendly screens
  • Multiple search strategies
  • Database search for specific terms and numbers. Use customized dictionary or hierarchy of UDC numbers to refine results.

Who should use UDC Online?
UDC can be used to index anything to exploit a field of interest to the full, and to enable efficient retrieval of information. UDC is now being used to arrange directories on the internet. Its application spreads almost universally across:

  • Libraries
    - shelf arrangement
    - information retrieval (classified catalogues)
    - collection management (acquisition, circulation statistics, weeding)
  • Museums and archives
    - collection management
    - objects indexing and retrieval
    - collection display
  • Bibliographies and bibliographic databases
    - subject information navigation
    - information retrieval
  • Information services
    - selective dissemination of information (user’s profile description)
  • Internet
    - subject gateways (information presentation and navigation)
    - metadata (information discovery).

Universal Decimal Classification – Abridged Edition
The abridged version of UDC is a useful reference for students, as it contains a selection of the most commonly used codes. It is a more affordable, portable and compact version than the complete UDC.
Read more or buy online

The Universal Decimal Classification: A Guide to its use
Revised Edition I C Mcllwaine
A useful source of information about the scheme, for practical usage by classifiers in their daily and as a guide to students learning how to apply the classification. It provides a wealth of examples to illustrate the ways in which the system can be applied, and outlines the history and development of UDC.
Read more or buy online

 Universal Decimal Classification Complete Edition
Derived from the MRF from the UDC Consortium, this is the Complete Edition containing all available references and classifications. UDC Complete Edition lists over 65,000 entries and comes in two volumes:
Volume 1 - Systematic Tables and Volume 2 - Alphabetical Index
Read more or buy online

Volume 1 – Systematic Tables
All ten tables
- Complete auxiliary tables
- Summary of the classification.
Read more and buy online  

  Volume 2 – Alphabetical Index
- Provides access to UDC tables
- Enables fast access to UDC tables through specially constructed index terms
- Must be used in conjunction with Volume 1.
Read more and buy online


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