System forecast locking in collaborative pattern design

Locking is a common technique in distributed editing system used to prevent conflicting, maintain user intention and result consistency. Collaborative pattern design system is a special class, thus has special locking scheme. A novel scheme system forecast lock is proposed such that some regions are picked up by system where user wants to operate in the following steps, and these regions are locked then. System will settle conflict whenever they occurred. By using the scheme proposed, system locks regions to forward users´ operations with great fluency, and prevent operating conflict.