Thinking this over (and after another note from Michael) it might be better to keep the mandatory inlining (so the whole mpd is usable with only the official library), but drop the dictated way of doing it (prefix etc).
Do note this does not change the way the (non part) submodels are prefixed (although one could make a point on loosening those rules too).
Do note this does not change the way the (non part) submodels are prefixed (although one could make a point on loosening those rules too).