Abstract

The research work presented in this paper is based on the concrete background of the Cooperative Graphics Editor (CGE), allowing two or more persons to remotely edit a graphic document simultaneously. A new concurrency control algorithm based on partial order set is presented, which has fast response and less undo-redo operations as there are no lock mechanisms. It is used to solve inconsistency caused by operation on intersecting graphics concurrently. CGE also possesses a mask strategy to solve inconsistency caused by operation on the same graphic concurrently.

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