The Web Applications Working Group has published a Working Draft of Clipboard API and events. This specification defines the common clipboard operations of cutting, copying and pasting, in such a way that they are exposed to Web Applications and can be adapted to provide advanced functionality. Its goal is to provide for compatibility where possible with existing implementations.
The Group also published a Working Draft of File API. This specification provides an API for representing file objects in web applications, as well as programmatically selecting them and accessing their data. Learn more about the Rich Web Client Activity.