Thus, it is a mistake to suppose that a name is identical to an object. The name merely points in the direction of the object it names. Objects do, however, have identifiers. These are the 128-bit universal unique identifier (UUID) data structures, which are the identities that the DCE components recognize. They are not usually seen by users, although they play a part in the object-finding process.
UUIDs are used within DCE to identify all sorts of things. From the standpoint of the application programmer, they have two main uses: to identify objects and to identify interfaces.