We also miss the support for foreignKeyDefinition.
Took us a while to figure out that Hiberante actually does not even support this attribute because actually Hibernate states that it's supports JPA 2.1 (We thought we misused the annotations somehow in the first place before figuring out the missing support)

@Andrea Boriero
@Emmanuel Bernard
@Gail Badner
@Gunnar Morling
Could someone tackle this issue please? Thanks!