The most general Set-Class in the Enterprise Ontology. Every instance of Set-Class is a subclass of EO-Set.
(<=> (Eo-Set ?X0)
(Exists (?Sc) (And (Set-Class ?Sc) (Instance-Of ?X0 ?Sc))))
(=> (Set-Of-Customers ?Customers) (Eo-Set ?Customers)) (=> (Set-Of-Products ?Products) (Eo-Set ?Products)) (=> (Set-Of-Vendors ?Vendors) (Eo-Set ?Vendors))
(<=> (Set-Of-Customers ?Customers)
(And (Eo-Set ?Customers)
(Set ?Customers)
(Forall (?X) (=> (Member ?X ?Customers) (Customer ?X)))))
(<=> (Set-Of-Products ?Products)
(And (Eo-Set ?Products)
(Set ?Products)
(Forall (?X) (=> (Member ?X ?Products) (Product ?X)))))
(<=> (Set-Of-Vendors ?Vendors)
(And (Eo-Set ?Vendors)
(Set ?Vendors)
(Forall (?X) (=> (Member ?X ?Vendors) (Vendor ?X)))))