@namespace(uri="subdiagrams", prefix="")
package subdiagrams;

@gmf.diagram
class Package extends PackageableElement {
   attr String name;
   @gmf.compartment
   val PackageableElement[*] contents;
}

@gmf.node(label="name")
abstract class PackageableElement {
   
}

class Clazz extends PackageableElement {
   attr String name;
}