What is the method of migrating the universe across domains and/or repositories?

The following are the steps followed while migrating a universe across repositories:

1. First open the universe in the current repository and make the connection as shared.
2. Save the Universe. (Save for all Users)
3. Open the universe in the designer and export that to the required repository.
4. Change the connection type from shared to secured.

Note: Both the repositories must reside within the same database schema.