This can go as deep as it needs to. A real life way of thinking about it is as such. Organisms are classified into a hierarchical scheme. Think of these as director objects. In dot syntax it would look like this.
Species is a property of genus, genus is a property of family, etc.
There are many species in genus and many genus in family. These are all properties. A smaller picture is, say, your family. Once you think of objects in that way, things start falling into place, especially with dot syntax. With objects and behaviors that use me, me is the object type.