Hi,
I think, you are asking for the linking of multiple universes into a single universe and this is compatible with SAP BO 3.1 Designer
Steps to Link Multiple Universes to a Single Universe with same Database and Connection
1. Create a Universe A (for instance) with proper parameters mentioning the Database and Valid Connections
2. Go to File>> Parameters>> Links tab and then Click Add Link
3. Then point the Universe B you wish to link
4. Similarly add a link to the other Universe C and then export the the Universe after saving to the repository.
** These universes are dynamically linked to the universe and the Objects, classes will be made available.
Thanks and Regards,
Arul Frances S