NIEM Releases

NIEM 4.2 is now available!

Current Release: NIEM 4.2

NIEM 4.2 is the current version of NIEM. Release notes are available on GitHub.

As a minor release, domains and domain code tables have been updated as needed. Core, all Core code tables, and the NIEM architecture are locked until the next major release, NIEM 5.0.

NIEM 4.2 conforms to the ReferenceSchemaDocument (REF) target of the NIEM Naming and Design Rules (NDR) Specification, version 4.0.

There are several ways to access NIEM 4.2:

Please send in any comment on the NIEM release as a GitHub issue.

In addition to the XML schema release, 4.2 incorporates a default JSON-LD context for NIEM 4.2:

NIEM JSON leverages JSON-LD (JSON for Linked Data), enabling it to maintain consistency and to connect data across exchanges. The JSON-LD context is a JSON file that identifies, for every namespace for NIEM content, the namespace prefix and its corresponding namespace URI.
See more about NIEM JSON.

Under Development: NIEM 5.0

The NIEM 5.0 major release will be published Fall 2020.

It will include new and harmonized content for Core, domains, and code tables; integrate Core Supplements 4.0.1 and 4.0.2; and will incorporate new architectural changes from the upcoming NIEM Naming and Design Rules specification, version 5.0.


Please note: This schedule is subject to change.

Product Date Issues Description
Alpha 1 Mar 2020 Alpha issues Major domain content submissions due.
Beta 1 May 2020   Harmonize and refine alpha changes. Smaller content submissions, code table updates, and new requests may still be addressed during this time.
Release Candidate (RC) 1 Aug 2020   QA and preparations for the release. Only bug fixes are considered during this stage; other requests will be queued for the following release.
Release Fall 2020   Publish release and update tools (SSGT, Movement, Migration Tool, ConTesA)

Additional phases (e.g., Beta 2) may be added as needed during the development process.

All NIEM Releases

NIEM release packages are available on GitHub and (NIEM’s original publication site).

There are also online tools available to search and view NIEM release content:

Release Release Package Links Year Zip Info Naming and
Design Rules
NIEM 4.2
(Current release)
GitHub | 2019 Zip Readme NDR 4.0 Submit feedback
Also available in Movement
NIEM 4.1 GitHub | 2018 Zip Readme NDR 4.0
NIEM 4.0 GitHub | 2017 Zip Readme NDR 4.0 4.0 architecture update summary
Introduces a default JSON-LD context artifact
Supports the NIEM Code Lists Specification
NIEM 3.2 GitHub | 2016 Zip Info NDR 3.0
NIEM 3.1 GitHub | 2015 Zip Info NDR 3.0
NIEM 3.0 GitHub | 2013 Zip Info NDR 3.0
NIEM 2.1 GitHub | 2009 Zip Info NDR 1.3 +
NIEM 2.0 GitHub | 2007 Zip Info NDR 1.3
NIEM 1.0 GitHub | 2006 Zip Info