It's just a mapping problem [computer application adaptation]

Adapting applications to each other requires mapping between the concepts, functions, or data native to each application, and identifying the abstractions under which each application can perform correctly and efficiently. Determining appropriate abstractions at any level is never easy, but doing so is critical to an application's utility and success. The article discusses the achieving of this, noting that it may be inordinately difficult to achieve 100% mapping but some of the unmapped functions may be very little used anyway.