[SQLObject] dependent relationships

[<len...@xs...>]

Hello,

I have three tables: RELATION, PERSON and COMPANY. RELATION has a
normal primary key that is autogenerated by SQLObject. PERSON and
COMPANY are dependent on RELATION, so there is a one-to-one
relationship from RELATION to PERSON/COMPANY, and the primary key of
PERSON/COMPANY is the same as the foreign key: RELATION_ID.

I have not been able to model this into SQLObject. Is this possible at
all? (I am using SQLObject 0.4). I think that what I am looking for is
a 'do not create a primary key column but use _somecolumn_ as primary
key for this table' option.

Thanks for any suggestions!

Lena