One can do this, to some extent, piecemeal with functionality the UFL Designer already has. However, it's a very manual process and does not actually have a way to show what data would be sent to PI for a particular file. An explicit test mode or test function, where the Designer outputs what the results might be for a supplied data file (Values of each variable, what would have been sent to PI, et.c) would be very helpful in building and verifying INI files.