How to move Entities and Functions between CA Plex Models?
You need to move part of your system that is currently on one CA Plex Model into an entirely new CA Plex Model.
This can be done via the Export function. Right-click an object in the Object Browser and choose XML Export from the Tools Menu. The XML Export dialog displays. In the File Name text box, enter the name of the export file.
For details,please see CA PLEX Online Help. Do keyword search for "Model Export" and you will see chapter: Model object export/import exporting a model,exporting a object , under Exporting an Object.