Description class for a Buffer in plc objects.
 The buffer contains graphic data used by the plc editor.

 Plceditor type for the class.

 Number of input, intern and output attributes.
 Element 0 : the number of input attributes.
 Element 1 : the number of intern attributes.
 Element 3 : the number of output attributes.
 Element 4 : not used.

 Number of plc subwindows.

 Class of subwindows.

 Not used.

 Not used.

 Method for drawing the plc symbol.

 0: The ordinary symbol for an object. Symbol with
     - header row containing class name,
     - footer row containing object names,
     - leadnames for all inputs and outputs.

 1: Symbol for objects where the inputs and outputs doesn't have to
    be specified.
    Symbol without leadnames for inputs and outputs.

 2: Equivalent with method 0, but equiped with an extra annotation
    field above the footer.
 3: Method for Text objects.
 4: Method for objects with special design.
 5: Method for a grafcet order.
 6: Method for document objects.
 7: Method for singlerow objects with maximum one input and one output.
    Displays the class name and object name in the object.

 8 and 9: This method uses method 7, 15 or 0 dependent on the number of
    used inputs and outputs.
 14: Method for singleline arithm objects.
 15: Method for double row objects with maximum two inputs and two outputs.

 Index used by the grapich method.

 The default input and output configuration.
 An array of bitmasks.
 Element 0: mask for input attributes, if a bit is set, the corresponding
            input will be displayed.
 Element 1: mask for output attributes, if a bit is set, the corresponding
            output will be displayed.
 Element 2: mask for input attributes, if a bit is set, the corresponding
            output will be inverted.

 Annotation in which the object name will be displayed.
 The common graph methods uses annotation 1 to display the object name.

 Attributes whose value will be displayed in an annotation
 will be searched for in RtBody.

 Attributes whose value will be displayed in an annotation
 will be serach for in DevBody.

 Compilation method. Method that generates plc code for the object.

 2:  Method for object without any plc code.
 4:  Method for an object with a standard function call.
 5:  Method for an object with a standard macro call.
 58: Method for an object with template plc code in class definition.

 Not used.

Metod used by trace.

 Not used.

 Method to connect the object to another object.
 0: No connect function.

 Method to calculate the execute order in the plc program.
 0: No executable code for this object.
 2: Ordinary method for objects with executable code.

 Name for class displayed in the plc editor.

 Name for an object instance created in the plc editor.

 Name of the attribute that trace uses to display the status of the object.