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The documentation of the OwnerOverlapCopyCommunication class says:

A class setting up standard communication for a two-valued
attribute set with owner/overlap/copy semantics.

What does this mean precisely? In particular:

• what does for a two-valued attribute set mean?
• What is the definition of owner/overlap/copy semantics?

This may all be obvious to the experts, but for the rest of us a more detailed description would be very helpful. It that description is given here in the thread I volunteer to turn it into a patch.