text: /**~package~
   * Model [Class]
   * 
   * Description
   * 
   * A model captures a view of a physical system. It is an abstraction of the physical system, with a certain purpose. This
   * purpose determines what is to be included in the model and what is irrelevant. Thus the model completely describes
   * those aspects of the physical system that are relevant to the purpose of the model, at the appropriate level of detail.
   * 
   * Diagrams
   * 
   * Packages
   * 
   * Generalizations
   * 
   * Package
   * 
   * Attributes
   * 
   *  viewpoint : String [0..1]
   * 
   * The name of the viewpoint that is expressed by a model (this name may refer to a profile definition).
  **/