摘要: Collaborative authoring tools generate network effects, where each tool's value depends not just on the tool itself, but number of other people who also have compatible tools. We hypothesize that best way to effects and add collaborative capability existing is focus protocol. This paper explores a protocol-centric approach by examining requirements functionality WebDAV Key features protocol are non-connection-oriented concurrency control, providing an upward migration path for non-collaborative applications, support remote manipulation namespace documents, simultaneous satisfaction wide range functional requirements.