6. The method of claim 5 wherein the essential data elements are determined based upon elements of a plurality of application-specific data object formats.
6. The method of claim 5 wherein the essential data elements are determined based upon elements of a plurality of application-specific data object formats. 7. The method of claim 6 wherein the essential data elements include an identification data element, invoice adjustment base data element, a billing data element, a status data element, and a list of invoice adjustment line item details data element.