Migration data SW -> ENOVIA

Hi, 
Do you have good solutions how to easy to do migration to ENOVIA?
I've got 5 project which I want send to the platform. Some Subassemblies are the same in few project.

Create a One Collaboration Space for all project and use Bookmarks or create 5 Collaboration Space but then how connect this same subassemblies? I don't want duplicate this data.

Best Regards,