U.S. flag

An official website of the United States government

National Library of Medicine NIH Common Data Elements (CDE) logo

Support for the 2023 NIH Data Management and Sharing Policy

Welcome to the NIH CDE Repository, hosted and maintained by the National Library of Medicine (NLM). If this is your first time here, you may be wondering how to use the Repository, and what it has to offer you.

Common Data Elements (CDEs) are data elements (or variables) that are defined and used the same way across multiple studies, to standardize the way data is collected. The use of CDEs supports the 2023 NIH Data Management and Sharing Policy by making data from different studies more interoperable. The NIH CDE Repository can help you identify CDEs for your data management plan and your research.

Learning about CDEs for the first time?

Wondering how to find CDEs for your research in the NIH CDE Repository ?

Still not sure where to start?

  • Take a look at NIH-Endorsed CDEs, which have been reviewed and approved by an expert panel, and meet established criteria. They are designated with a gold ribbon. New NIH-Endorsed CDEs will be added on a rolling basis.

Have a question about the Repository?