METHOD AND DEVICE FOR MANAGING CHANGE CANCEL INFORMATION

摘要

PURPOSE:To provide an economized method and device for managing change cancel information by reducing the quantity of cancel information to be stored. CONSTITUTION:The information for the respective operations of a change operation and a cancel operation to an operating object 4 as information to be operated is divided into the history information of the respective operations and the cancel information required for canceling the respective operations, which are respectively stored in an operation history information storage part 1 and a cancel information storage part 2, and the cancel information to be generated in the case of the cancel operation is replaced with cancel information accompanying the operation as the object of this cancel operation, and the replaced cancel information is stored in the cancel information storage part 2.