You can assign a main provider of type MultiProvider or central CompositeProvider to the workspace. This has the following result:
On the Central Data tab page in the administration transaction, all InfoCubes belonging to the main provider are displayed and can be selected for use in the CompositeProvider.
You cannot change this assignment once a CompositeProvider has been created.
The main provider's links are taken over automatically if you use InfoCubes from the main provider defined in the workspace in a CompositeProvider.
A query based on this main provider can be used as a referenced query for a CompositeProvider.
The authorizations on the main provider are applied for query execution.