Parameters of control classes

  •   We can parametrize these common features to express the characteristics fo the control class.
      Here parameters ?t and ?t profile denotes a town and its profile, repectively.
  •   We can simplify this class notation:
  •   Simplify this class notation one step further:
      DataProbe represents a family of controls that appear as icon and provide access to a data object. and ?target denotes any data object.