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NIEM Version 5.1 Release is Now Available

NIEM version 5.1 is now available for download and use. This release is the latest version of the NIEM common vocabulary that enables efficient information exchanges across diverse public and private organizations. NIEM 5.1 is a minor release that incorporates content identified since the NIEM 5.0 major release was published in October 2020. 

Highlights of NIEM 5.1 include:

  • Biometrics domain
    • Added additional DNA-related content
    • Updated pedigree content
    • Restored original DNAPedigree components from 4.1 for backward compatibility
  • CUI
    • Split the single Limited Dissemination Control (LDC) code set into separate document marking and portion marking LDC code sets
  • Cyber domain (new)
    • Added content supporting Federal Incident Reporting Requirements (FIRR)
    • Added content supporting State, Local, Tribal, and Territorial (SLTT) Agency Cyber Incident Reporting Requirements (CIRR)
    • Emergency Management domain
    • Added flood damage claim content from OpenFEMA
  • Justice domain
    • Moved Justice elements with a NCIC data type to the NCIC namespace
  • Military Operations domain
    • Added content from the Joint Non-Kinetic Effectiveness (JNKE) IEPD
  • NCIC codes
    • Re-added 4.2 code sets that were removed from the 5.0 release due to harmonization efforts across the FBI and Justice code sets for legacy support
    • Removed ncic:BOATCodeType as it is no longer being used
    • Updated codes for NIEM 5.1, with changes to the MAK, VMA, and VMO code sets

For a complete list of all the changes, release stats, and associated specifications, see the Release notes.

About the National Information Exchange Model
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