is there a possibility to use classes of external libraries in VP-UML. For instance, I would like to create a class that implements the javax.swing.tree.TreeNode interface. Is there any way to get this interface in my model (without having to reverse engineer the whole java source)?
P.s.: is there any way to specify a generalisation or realisation relationship in the properties of a class (rather than by a physical link in the diagram - I might choose not to have a superclass in the diagram…)