Right of ownership comprising at least one private portion (e.g. an apartment) and a share (%) of the common portions reserved for all (e.g. the corridors) or, as the case may be, only for some of them (e.g. a balcony). The share in the common portions of a fraction is equal to its relative value. In addition, each fraction constitutes a separate entity and may be the object of a partial or total alienation. It includes, as the case may be, the right of use of the common portions for restricted use.