A unique set of data elements, and/or a different set of FTRs, and/or a unique set of calculations make one external input unique or different from other external inputs. That is, one of the following must be true:

Calculations alone are not an elementary process but part of the elementary process of the external input. A calculation (or derived data) does not make the transaction an external output. External outputs and derived data will be discussed in detail in the external output section of this document.