What changes regarding foreign key processing have been made in release 7.2?
7.2- Repository-Webstation Option
The repository objects that represent foreign keys have changed. The FKEY REF relationship between a key and another table is no longer used. The relationship ORC FREF between the foreign key and the key of another table is used instead. The model changes now allow a foreign key to have different key column names than the primary key when the foreign key is based on a primary key.