Separating logic from interface

Good morning all,

This is perhaps a bit of a heavy topic for a Monday morning, but it's on 
my mind so I'll ask.  Does anyone have any references or sample code which 
gives some guidance on structural programming techniques for separating 
display logic from business logic in RPG.  I am familiar with the 
Model-View-Controller (MVC) technique in OO languages, but I am having 
trouble figuring out the best way to apply these sorts of techniques in a 
structured programming environment.

Any guidance would be much appreciated,
Adam
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