Programs having different machine content organizations communicate with one another. This communication is enabled by a linkage design incorporating program attributes, which allows the savearea layout and linkage services for a program to be selected at compile time. The selection of the savearea layout and linkage services, at compile time, enables the provision of a source code with reduced dual path code. The source code includes, for instance, at least one common name usable in referencing analogous fields in different savearea layouts, which further reduces the need for dual path source code.