摘要：Abstract Operational transformation (OT) is the most effective method for consistency and concurrency control in multi-user groupware applications. This study proposes a new string-based OT algorithm to address the challenge of swapping and transposing two deletions. It has removed the faults of previous existing algorithm swapDD (ABTS: a transformation-based consistency control algorithm for wide-area collaborative applications, collaborative computing: networking, applications and worksharing 1–10, 2009). Existing algorithm swapDD fails totally in transposing two deletions if the first operation region is included in the second operation region or the second operation string is covered by the first operation string. In addition, swapDD has not considered partial overlapping between two deletions in swapping and fails at boundary conditions. New proposed algorithm works well in all possible cases of transposing two deletions. It handles overlapping and splitting of operations.
关键词：Inclusive transformation algorithm;Distributed systems;Concurrency control;Consistency control;Groupware system
