Media, method and system for creating software capable of performing the steps necessary to prepare a complex form, and more particularly to the use of annotations to specify dependency information for the fields of the form. Embodiments of the invention break down the logic of complex forms into the much simpler logic of individual form fields, greatly simplifying the implementation of the overall logic by allowing individual fields to be worked on independently, with clear delineation of structure and function between them. Embodiments of the invention further allow a user to specify the immediate precursors for a field, and then automatically determine a global calculation order for all fields that ensures that all of the precursor fields for each field being calculated have been previously calculated before that field is calculated.