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   An element is a constituent of a model. 
   Description 
   Element is an abstract metaclass with no superclass. It is used as the common superclass for all metaclasses in the infrastructure
            library. 
   Generalizations 
   • None 
   Attributes 
   No additional attributes 
   Associations 
   No additional associations 
   Constraints 
   No additional constraints 
   Semantics 
   Subclasses of Element provide semantics appropriate to the concept they represent. 
   Notation 
   There is no general notation for an Element. The specific subclasses of Element define their own notation.