%system %string A $ Declares a global variable that holds its value up $ the next time GenerateStart.sdl is called
In ACS there is a new kind of variable locality, the %system locality.
The %system prefix causes a variable to preserve its value between different calls to Generate.sdl.
%system variables are usually declared inside GenerateStart.sdl, but this is not a must. In principle, they can be declared everywhere (but inside %operation bodies). Values assigned to %system variables from within the GenerateStart.sdl module are kept up to the next call to GenerateStart.sdl (that will occur during the next generation process).
%system variables can be %string, %numeric, %object and %list types as any other variable in the system.