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What is DDI?

About the DDI Standards

The Data Documentation Initiative (DDI) is an effort to create an international standard for describing data from the social, behavioral, and economic sciences. Expressed in XML, the DDI metadata specification now supports the entire research data life cycle. DDI metadata accompanies and enables data conceptualization, collection, processing, distribution, discovery, analysis, repurposing, and archiving.

DDI Lifecycle Model

For current implementations of DDI and its benefits for different applications, see DDI at Work.

To ensure continued support and ongoing development of the standard, DDI has been branched into two separate development lines. These two branches; DDI-Codebook (formerly DDI2) and DDI-Lifecycle (formerly DDI3); are explained in more depth on the specifications page. For more information on getting started with DDI, there are plenty of resources on the website including our FAQ and mailing list.


About the DDI Alliance

The DDI Alliance is a self-sustaining membership organization that develops and promotes the DDI specification and associated tools, education, and outreach programs. For more information on the history of DDI, see the DDI Timeline.

A word cloud generated from all the pages on the DDI website

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