The "acronym" link navigates to the latest version of the specification, this link changes whenever a new version of the specification is published.
The "Version" link navigates to the specific version.

Name Acronym Version Status Publication Date
Total: 5
Date-Time Vocabulary DTV™ 1.3 formal May 2017
Interface Definition Language IDL 4.2 formal March 2018
UML Profile for NIEM NIEM-UML™ 3.0 formal April 2017
Unified Modeling Language UML® 2.4.1 formal July 2011
Unified POS UPOS 1.15 beta 2 beta May 2019