18. The non-transitory tangible machine-readable medium of claim 17 , wherein the common invoice data object format comprises one or more related data elements, and the one or more related data elements comprise at least one of a related party data element, a related payment method data element, a related payment terms data element, or a related comments data element.
17. The non-transitory tangible machine-readable medium of claim 16 , wherein the common invoice data object format comprises at least one complex data element.