The version naming scheme for IBM MQ for z/OS

On IBM® MQ for z/OS®, releases have a three digit Version, Release, and Modification (VRM) level. To run a queue manager at a different VRM level, you must migrate the queue manager, its applications, and the environment in which it runs.

The release level of IBM MQ for z/OS is described by a three-digit VRM level. This applies to both Long Term Support (LTS) and Continuous Delivery (CD) releases.

The two release types are distinguishable by the modification number in the version.release.modification (V.R.M) release identifier:

Long Term Support releases have a modification number of zero, for example 9.0.0 and 9.1.0.
Continuous Delivery releases have a modification number that is non-zero, for example, 9.0.3, 9.1.5, and so on.

The command level of a queue manager is the three-digit VRM level. You can look at the queue manager command level in the queue manager property panel in IBM MQ Explorer. An IBM MQ program can call MQINQ, passing the MQIA_COMMAND_LEVEL selector, to obtain the command level of the queue manager it is connected to.