The Open Data Element Framework (O-DEF), a standard of The Open Group, enables information interoperability by common categorization of basic units of data.


The O-DEF Collaboration Page

Get involved in collaborative development of the O-DEF and of tools to support it! Visit the O-DEF collaboration page.

The Initial O-DEF Index

The O-DEF consists of an index and a method for using it to classify data elements. View the initial index!

The O-DEF Standard

The O-DEF standard defines the structure of the index and describes the method and how to use it. Download the standard from The Open Group publications catalog!


See the video The Open Group O-DEF Standard, a Framework for Making Standards Work™

The O-DEF enables basic units of data to be classified, so that equivalences and similarities between them can be determined easily. This simplifies the development of interface software and contributes to improved management and organization of data. While it may have other applications, the O-DEF is primarily intended for deployment within extended enterprises, and by groups of collaborating enterprises.

Using the O-DEF index, a practitioner can tag a data element by assigning a name and numeric identifier to it according to its meaning.

The index is federated. It consists of a core index and a collection of plugins. The core index, and each plugin, is potentially infinitely extensible. A plugin can be developed by a standards organization, by a body of specialists in a particular area, by a user enterprise, or by a group of user enterprises. This allows for integration of independently-developed vocabulary standards.