(<=> (One-Many ?R)
(And (Binary-Relation ?R)
(Value-Type ?R Inverse Function)
(Value-Cardinality ?R Inverse 1)))
(Binary-Relation ?R)
(<=> (One-Many ?R)
(And (Binary-Relation ?R)
(Value-Type ?R Inverse Function)
(Value-Cardinality ?R Inverse 1)))