http://gerdleonhard.typepad.com/the_future_of_music/files/joost_smiers_imagine_a_world_without_copyright_feb_2005.pdf
"The concept of usufruct is better known in societies under civil law
than in those that are governed by common law, like the Anglo-Saxon
parts of the world. Characteristic for usufruct is that one does not
have the ownership of an item; however, one is entitled to the usage
of the fruits of the item. If the item is, say, a house, the
entitlement could be, for instance, the usage of the house without
owning it.
The person that holds usufruct is, for example, allowed to live there
for free or to receive the proceeds of any rental activity. In our
case, the item might be a book; from the moment of its publication it
belongs to the public domain and the holder of the usufruct is
entitled to the takings and receipts of the book. Under the present
system of law, usufruct can only emerge when it is derived from an
ownership title. What we envision is that the creative work, as we
will argue below, exists only in the public domain, its ownership is
shared amongst all, and thus belongs to the commons. Whoever enjoys
the temporary usufruct of a certain artistic work, has thus received
it from the public domain. The usufruct keeps unimpeded the freedom of
everybody to adapt works of art – creations and performances – in a
creative manner. The technical details concerning the implementation
of this matter still will have to be worked out."