@gmf.diagram(foo="bar")
class Domain {
	attr String name;
	val ModelElement[*] elements;
}

abstract class ModelElement {
	attr String name;
}

@gmf.node(label = "name", figure = "rectangle")
class FClass extends ModelElement {
	//val Property[*] properties;
}

@gmf.node(	label = "name", 
			figure = "ellipse", 
			size = "10,10",
			label.placement="external")
class GenSpec extends ModelElement {
	@gmf.link(target.decoration="closedarrow")
	ref FClass supertype;
	@gmf.link(target.decoration="none")
	ref FClass[*] subtypes;
}