anchor.diff:  ;;; * UML-Class
   
   (def-uml-package "UML") ;; ?
  -
   
   
   (defclass uml-class (classifier uml-transform-class)
  
positive.code:   (:namespace
     ("uml" "http://www.omg.org/spec/UML/20110701" ))
    (:uml-name "UML::Classifier")
    (:is-absract . t))
  
negative.code:   (:namespace
     ("uml" "http://www.omg.org/spec/UML/20110701" ))
    (:uml-name "UML::Namespace")
    (:is-abstract . t))
  
  
  (defclass classifier (namespace type)
  