The following table lists the dates for all 4.x releases of the Message Queue product and describes the main changes associated with each release.
Table 1–1 Revision History| Date | Description of Changes | 
|---|---|
| May 2006 | Initial release of this document for version 4.0 of Message Queue. | 
| January 2007 | Initial release of this document for Beta version 4.1 of Message Queue. Adds description of JAAS support. | 
| April 2007 | Second release of this document for Beta version 4.1 of Message Queue. Adds high availability feature. | 
| September 2007 | Third release of this document for customer ship. Adds description of support for Java Enterprise System Monitoring Framework, fixed C ports, bug fixes, and other features. |