I am currently doing some model transformations.
In my model transformation I generated Enumaration Class and their attributes: here it's an EnumerationLitteral.
The question now is that I want to get the default value of EnumerationLitteral type.
There is no such thing. You can set the default value locally for any attribute or parameter or variable that is typed by the enumeration. If you want a global default value, use convention, for instance, the first value is the default value.