It's becoming clear that the _form_exchange is the closes thing to the protocol because it knows nothing about UI. However another abstraction concept is that the jQuery AJAX function, in editor-slides.js, itself, are also protocol based because they deal with the success or failure and this it would bring UI depending on each kinf of expected UX. So, thus depending on boosters or injected UX data, MVC client of course. This adds to #134