Mixed-release environment
Licensed programs or their options do not always have the same release as the i5/OS® operating system.
In addition to licensed programs not always being at the same release, they can be packaged so that the product's options are not at the same release as its base. This is referred to as a mixed-release environment. For these reasons, your V5R4 media might contain licensed programs and options that are at different releases than V5R4. Products that do not have any new function for this release are not repackaged, and therefore could have a release previous to V5R4. Licensed program releases and sizes contains information on the version, release, and modification level of the standard and keyed set products. You can also look at the product information to determine OS/400® and i5/OS releases that are supported.
Parent topic:
Concepts for software installation