Current Status
NIEM4/Latest is the working directory for the 2025 revision. The initial commit was the 2015 version, so all diffs are from 2025 changes.
The Draft for A/N-ITL 1-2025 is complete. Reviews are welcome, with comments requested by August 30th, 2026. 

Good starting points are AllFields.xml or ITL.xsd. For ease of reviewing, all changes for 2025 are also noted with XML comments that start: <!-- 2025

Contact information
Jennifer Stathakis, John Grantham, Dylan Yaga
NIST | Information Technology Laboratory
biometrics-editor@nist.gov

Related Material
https://www.nist.gov/programs-projects/ansinist-itl-standard
https://www.nist.gov/itl/iad/btg/ansinist-itl-standard-references
https://www.nist.gov/services-resources/software/biometric-testing-software/biometric-conformance-test-software-biocts-1