11. The method of claim 1 , further comprising generating a relational model from the business object model by generating a plurality of table definitions and foreign key constraints between the said tables.
11. The method of claim 1 , further comprising generating a relational model from the business object model by generating a plurality of table definitions and foreign key constraints between the said tables. 13. The method of claim 11 , wherein generating the plurality of foreign key constraints further comprises using a field type to find an object with a key field of the same type or any of base types thereof, that object providing the referenced table definition for the foreign key constraint.