Patent ID: 7620649

Claim:
A data management method for managing original data, first derivative data which is generated through editing processing on the original data, and second derivative data which is generated through editing processing on the first derivative data, by relating the original data, the first derivative data, and the second derivative data, the data management method comprising the steps of: generating first link information for linking the original data and the first derivative data and first editing information representing the content of the editing processing on the original data; attaching the first link information and the first editing information to the original data as first accompanying information thereof; generating first reverse link information for linking the first derivative data and the original data and the first editing information representing the content of the editing processing on the original data; attaching the first reverse link information and the first editing information to the first derivative data as second accompanying information thereof; generating second link information for linking the first derivative data and the second derivative data and second editing information representing the content of the editing processing on the first derivative data; attaching the second link information and the second editing information to the first derivative data third accompanying information thereof; generating second reverse link information for linking the second derivative data and the first derivative data and second editing information representing the content of the editing processing on the first derivative data; and attaching the second reverse link information and the second editing information to the second derivative data as fourth accompanying information thereof.