I fully agree with you and what you said is basically the same as my comment. You probably misunderstood it. What I meant is that logical data layer (I call it

I fully agree with you and what you said is basically the same as my comment. You probably misunderstood it. What I meant is that logical data layer (I call it data delivery, which of course includes translation) should not serve any other function, i.e. be some system with business logic other than translation.