| Version | Date | Comments |
| 1.0 | March 7, 2002 | First release for review. |
| 1.1 | March 13, 2002 | Revised document based on Software Group review. |
| 1.2 | May 24, 2002 | Revised document to add VxWorks as a required platform for the C-API, changed the specification of the maximum string length to be at least 80 characters, and removed the ability to trace individual objects or clients. |