1. A method for use in developing an application involving transformation of data between a first form and a second form, comprising the steps of: providing a set of application adaptable conversion modules, wherein each said module includes rules for use in converting data objects relating to a defined subject matter area between said first form and said second form, and each said module is application adaptable in that said rules function independent of any purpose specific to a particular application beyond said conversion; selecting a first module of said set of modules for a first application under consideration; and first operating a machine-based tool for purposing said selected first module for use in said first application under consideration such that said first module is adapted to perform functionality related to a first identified purpose of said first application under consideration.