The the-identity-unary-scalar-function-for-domain is a scalar function which has a range = 1 for the exact-domain ?domain; f(x) = 1 forall x in ?domain.
(=> (The-Identity-Unary-Scalar-Function-For-Domain ?Domain ?F)
(And (Subclass-Of ?Domain Scalar-Quantity)
(Exact-Domain ?F ?Domain)
(Forall (?T)
(=> (Instance-Of ?T ?Domain)
(= (Value ?F ?T) Identity-Scalar)))))