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: 4
Event Service EVNT™ 1.1 formal March 2001
Life Cycle Service LFCYC™ 1.1 formal June 2000
Persistent State Service PSS™ 1.0 formal June 2000
Person Identification Service PIDS™ 1.0 formal June 2000