A relation R HAS-SINGLE-SLOT-VALUE-OF-TYPE T with respect to domain class C if for every instance i of C there exists exactly one v such that R(i,v) and v is an instance of T.
(<=> (Has-Single-Slot-Value-Of-Type ?Class ?Binary-Relation ?Type) (And (Class ?Class) (Binary-Relation ?Binary-Relation) (Class ?Type) (Single-Valued-Slot ?Class ?Binary-Relation) (Has-Slot-Value-Of-Type ?Class ?Binary-Relation ?Type)))
(Nth-Domain Has-Single-Slot-Value-Of-Type 3 Class) (Nth-Domain Has-Single-Slot-Value-Of-Type 2 Binary-Relation) (Nth-Domain Has-Single-Slot-Value-Of-Type 1 Class)
(<=> (Has-Single-Slot-Value-Of-Type ?Class ?Binary-Relation ?Type) (And (Class ?Class) (Binary-Relation ?Binary-Relation) (Class ?Type) (Single-Valued-Slot ?Class ?Binary-Relation) (Has-Slot-Value-Of-Type ?Class ?Binary-Relation ?Type)))