2. The method of claim 1 , wherein at least one constraint for preserving referential integrity specified by the constraint specification is based on dependence of values for a field of the second dataset on values for a field of the first dataset.
2. The method of claim 1 , wherein at least one constraint for preserving referential integrity specified by the constraint specification is based on dependence of values for a field of the second dataset on values for a field of the first dataset. 3. The method of claim 2 , wherein the field of the first dataset is a primary key and the field of the second dataset is a foreign key that references the primary key.