5. The method of claim 2 , wherein determining the processing order for the multiple datasets includes determining that the first dataset occurs before the second dataset in the processing order based on the dependence of values for the field of the second dataset on values for the 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.