anchor.diff:    (:metaclass metamodel-stub-class)
     (:model *boostrap-model*)
     (:model-metaclass "uml:Class")
  -  (:cname "UML:Classifier")
  +  (:qname "UML:Classifier")
     (:is-abstract t))
   
   
  
positive.code:   (:metaclass metamodel-stub-class)
    (:model *boostrap-model*)
    (:model-metaclass  "uml:Class")
    (:cname "UML:NamedElement")
    (:is-abstract t))
  
  
  
negative.code:   (:metaclass metamodel-stub-class)
    (:model *boostrap-model*)
    (:model-metaclass  "uml:Class")
    (:qname "UML:Element")
    (:is-abstract t))
  
  
  