View-centric Operational Transformation for Collaborative Editing

Collaborative editing enables multiple users who reside remotely to share and edit some documents at the same time. It is fundamentally based on operational transformation which adjusts the position of operation according to the transformed execution order. For a last decade, many researches have been performed in this area and the correctness and possibility of operational transformation have been proved. Even though operational transformation gives us the possibility of collaborative editing, it has a limitation with a viewpoint of usability and efficiency. In other words, the existing operational transformation is devised without considering the properties of collaborative editing such as the frequency of operational transformation and human-centric viewpoint. In this paper, we would like to introduce view-centric operational transformation which considers the priority of transforming operation according to user's viewpoint. Using this way, we have tried to improve the existing operational transformation and provide more useful and efficient collaborative editing