Let in Incident table category has 2 choices (Hardware ,Software)
problem table category has 2 choices (Network ,Database)
In my customs table there are two field
1.Chose Table (Reference type-->sys_db_object)
2.Category(Choice--> value is None)
when user choices table is Incident then in category field (Hardware ,Software) will be populated.
when user choices table is problem then in category field (Network ,Database) will be populated.
when user choices any other table then in category field related category will be populated if their is no category field in chosen table then NONE will be show.
