NIEM 3.1


The National Information Exchange Model (NIEM) is an interagency initiative that provides the foundation and building blocks for national-level interoperable information sharing and data exchange.

This package contains the NIEM 3.1 reference schemas (Core, code lists, domains, type adapters for external standards, as well as the schemas, schema profiles, or adaptations for those standards). It also contains a spreadsheet of the model, a spreadsheet for all code lists, a change log, and an XML catalog. NIEM provides practitioners and developers with a baseline set of reusable XML Schema components for building Information Exchange Package Documentation (IEPDs).

NIEM 3.1 contains content changes over the last NIEM release; no architectural changes have been made. This version conforms to NIEM Naming and Design Rules (NDR) v3.0.

Release Package

NIEM 3.1 - The release package includes all NIEM schemas for this release as well as the changelog and spreadsheet.


NIEM Core Schemas

NIEM Domain Schemas

NIEM Conformant Schemas (code lists and adaptations of external standards)

Caution: Links to source information may no longer be valid.

NIEM Proxy Schemas

Special NIEM Schemas

NIEM Domain Updates and Core Supplements Issued for this Release