Is there ways to put custom value types into a mapping for generating schema? Otherwise it's a obvious discrimination.
PS: Also it would be fine to be able to generate classes for them. Because actually in such simple cases all is obvious and code repeats itself if you have several such enum tables.

Well, maybe the previous task is not such simple as seems. But then can someone says how to mark custom value type link with foreign key constraint? I tried declare both property and many-to-one but failed. What I thought else is foreign-key for column element or something like constrained but nothing is available.