I need to develop a functional spec for a payroll interface. I have created many FDS in SAP Payroll; but I have not worked alot with interfaces and or design a functionl spec for a payroll interface. Can someone with this expertise advise where I can obtain a reliable template that will guide me in developing a FDS for a payroll interface? I want to ensure I include all the appropriate specifics that the ABAP team will need to develop this payroll interface. What are the components that I should hi-lite / call out in the FDS?