Support for control interfaces
Currently there is not notion of control interfaces in the F4E model. This concept was not added at the beginning because it is not explicitly present in the Fractal ADL XML and because at runtime control interfaces are simple server interfaces with special names. But in Fractal ADL it is possible to use control interfaces (even if they are not explictly described) in bindings.
For the tree editor control interfaces concept is not a real problem because you first create the binding element and after you specify the interfaces names.
For the graphical editor it is a problem because the binding object is created from two preexisting interfaces elements, and control interfaces elements don't exist, so it is not possible to create and represent graphically a binding that involves a control interfaces.