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IMPORTANT -- NIEM 3.1 Beta1 is available for public review and comment from March 23–April 6.

NIEM version 3.1 is an upcoming minor release that incorporates user needs identified since NIEM version 3.0 was published.

Learn what’s in NIEM 3.1, find out how to submit comments, and get links to download here.

Thermometer graphic 3.0 Fireworks


Current Release: NIEM version 3.0
Release Date: November 2013

Download the current release of the model and schemas here.

Want to know how the model changed from 2.1 to 3.0? Find out here.

Learn more about the NIEM release cycle here.


Important NIEM 3.0 specifications are available:

Naming and Design Rules (NDR): This document specifies principles and enforceable rules for NIEM-conformant schema documents, instance XML documents, and data components.

Model Package Description (MPD): This document specifies normative rules for organizing and packaging Model Package Descriptions. An Information Exchange Package Documentation (IEPD) is a type of MPD. It defines required and optional artifacts, metadata, schemes, and syntax. It also provides some non-normative guidance.

Conformance: This document defines general conformance to NIEM.

Conformance Target Attribute: This document specifies an XML attribute that may occur within XML documents to establish a claim that the document conforms to a set of conformance targets.

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