Article 1010
Co-ownership is ownership of the same property, jointly and concurrently, by several persons each of whom is privately vested with a share of the right of ownership.
Co-ownership is called undivided where the right of ownership is not accompanied by a physical division of the property.
It is called divided where the right of ownership is apportioned among the co-owners in fractions, each comprising a physically divided private portion and a share of the common portions.