examples/org.eclipse.epsilon.examples.mddtif/metamodels/CompetitionDsl.emf

package CompetitionDsl;

class NamedElement {
  attr String name;
}

class Competition extends NamedElement {
  val Group[*] groups;
  val Competitor[*] competitors;
}

class Competitor extends NamedElement {
  attr String information;
  ref Group#competitors group;
}

class Group extends NamedElement {
  ref Competitor[*]#group competitors;
}