Skip to main content
U.S. flag

An official website of the United States government

Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.


Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


NIEM 5.1 Release Candidate Available for Public Review and Comment

The NIEM 5.1 release candidate 1 (RC1) is available for public review and comment through Wednesday, November 3, 2021. Please visit the NIEM Releases page for instructions on how to download the RC1 package.  Please provide feedback by submitting a new 5.1 issue or by sending an email to
This is the final stage before we officially publish the final NIEM 5.1 release. At this point in the release cycle, we are working to get to a stable draft and are looking to address errors and bugs only. Other issues can be queued up for the next release.  The final release of NIEM 5.1 is scheduled to be published later this fall. At that time, NIEM 5.1 schemas and documentation will be published along with updates to NIEM tools.

About NIEM
The National Information Exchange Model (NIEM) provides a model framework with rules and guidance designed to develop consistent, well-defined, enterprise level information exchanges. NIEM successfully supports communities of interest with a shared need to exchange data within federal, state, local, tribal, and territorial agencies, internationally, and in the private sector.
To learn more, please visit