One of my metamodels have some attributes defined as EDate, but now in the transformation I can't find the way to work with them. I mean I can't define, e.g. a helper as helper def : getDate(....) : EDate = ..., or as helper def : getSomething (...) : String = let a : Sequence(Edate) = MM!Command.allInstances()->collect(i | i.date) in ...
How can I do? Do I have to specify that EDate is an Ecore data-type?, but how?