abstract class ContentUnit {
  attr String name;
}

@gmf.diagram(foo="bar")
class ContentModel extends ContentUnit {
  attr String webApplicataionName;
  attr String siteCollectionName;
  val Web ownedWeb;
}

@gmf.node(label = "displayName")
class Web extends ContentUnit {
  @gmf.compartment(foo="bar")
  val CustomList[*] ownedList;
  @gmf.compartment(foo="bar")
  val Web[*] ownedWeb;
}

@gmf.node(label = "displayName")
class CustomList extends ContentUnit {
}