Hi all,
I have designed database with five tables. the fifth table contains all the primary keys of the first for tables as foreign keys.

Sample Structure

First Table
First_Id(Primary Key)
First_Name

Second Table
Second_Id(Primary Key)
Second_Name

Third Table
Third_Id(Primary Key)
Third_Name

Forth Table
Forth_Id(Primary Key)
Forth_Name

Fifth Table
First_Id(Foreign)
Second_Id(Foreign)
Third_Id(Foreign)
Forth_Id(Foreign)
Data
OtherFields

i have wrote all the mapping files for the first four tables. But with the foreign keys it gives errors. can u guys have a idea of how to write a mapping file for the fifth table?

Thanks