In many cases it'll be identical or similar but in many it'll be different, however as Hicks said the end goal is to maximize the amount of functionality for both the devs and modders/players to do what they want with the game. Only the server scripters, mod makers would understand what I am referring too.

Arma series mods are truly some work of genius by these mod teams. If so expect so much more to happen with mods then I ever expected.

Will it be possible the file structure we have now, BI coding still be somewhat what we expect in the future.