In Versions 4.0, 4.01, and 4.02, the XD image types included--
In Version 4.5, the image types changed to the following:
The image types now apply to the platform they represent. The CICS and IMS API's must be loaded into the image type as a feature. If your application checks the value of the subsystem type "TM" when loaded into an image, do either of the following before loading your application into a Version 5.5 image: load the CICS or IMS feature or change your application so it checks for a different subsystem type at runtime.