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
Event Service EVNT™ 1.2 formal October 2004
Life Cycle Service LFCYC™ 1.1 formal June 2000
Security Service SEC 1.8 formal March 2002
Time Service TIME 1.1 formal May 2002
Transaction Service TRANS 1.4 formal September 2003