A collaborative editing approach based on single-user application extending
一种扩展单用户应用程序实现协同编辑的方法

An approach to extend single-user application was proposed to support collaborative editing. The approach supported unconstrained collaboration, and used operational transformation to maintain data consistency. In order to make best use of operational transformation, a linear sequence outside single-user application was used to index the objects in documents. David Sun's extending operational transformation algorithm was improved on the control layer to support documents sharing control of complex object structure.