Data - object containing undo information for storage in a command

       Data  is  an  abstract  base  class  for  objects  that  components store in commands they (un)interpret.
       Components use Data subclasses to store whatever information they need to uninterpret the command.

       Data - object containing undo information for storage in a command

Data() The constructor is protected to prevent instantiation.

Command(3U), Component(3U), Resource(3I)

Unidraw                                          23 January 1991                                        Data(3U)

#include<Unidraw/Command/data.h>