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DDC 23: Four printed volumes help keep your collections organized

Photo: DDC 23 Print Edition

DDC 23, the four-volume unabridged edition of the Dewey Decimal Classification (DDC) system, reflects the many changes to the body of human knowledge that have occurred since DDC 22 was published in 2003. Published in mid-2011, DDC 23 includes helpful tools that make the classification easier to use.

You can download PDF versions of DDC 23 highlights, including an introduction, a glossary and a list of new features. Each of these tools will help you better understand how the DDC organizes knowledge into a classification that is useful to library users worldwide.

The DDC 23 Introduction is a full reprint from volume 1 of DDC 23, provides a detailed overview of the DDC, including basic terminology and an explanation of DDC structure, complete with many helpful examples. If you are new to classifying with Dewey, this introduction will help you get started quickly.

Relocations and Discontinuations is an Excel file that is based on the Relocations and Discontinuations found in volume 4 of DDC 23. The file includes all relocations and discontinuations since Edition 22.

The Glossary is also reprinted from volume 1 of DDC 23, provides helpful definitions of DDC terms and gives users a common language for implementing the DDC.

New Features is another reprint from volume 1 of DDC 23, concisely describes what's new in DDC 23, including changes implemented to enhance classifier productivity and a selected list of specific changes to DDC numbers. Look here if you want to quickly assess the changes from DDC 23 that you can apply to your collections.

DDC 23 Errata is a list of corrections to address significant typographical errors in the print edition of DDC 23. Updates to the content of DDC 23 are available in WebDewey 2.0.

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