3.15.1 Abstract Data Model
The message exchanging that occurs in this section of the Remote Assistance Protocol is used to synchronize the state of the desktop sharing. In response to a share control request from the expert, the novice SHOULD first enable the sharing of the screen, and then send a response to the expert that share control has been granted. When share control is stopped by the novice, the novice MUST send a message indicating that desktop sharing has been stopped. When share control is released by the expert, the expert MUST send a message indicating this action. When the novice receives this message, the novice MUST disable share control of the screen.