Multiart

Multiart is a shared whiteboard client application that exhibits the common characteristics of simple Web-based DCAs:

• collaboration - multiple users work together to create and edit an image;
• shared state - the ``canvas'' and all shapes added to it are accessible by all users;
• client-side updates - users' actions drive changes to the state representing the image;
• tolerance for short-lived inconsistencies - the object of collaboration does not rely on 100% accurate data at all times. The application is still a useful collaboration tool despite the time it takes to reflect other users' updates;

Multiart's capabilities are limited to creating and updating shapes. Its purpose is to illustrate use of the Relay system for graphical DCAs. The Multiart user interface has two roles: (1) displaying shared state, and (2) allowing user interaction to generate client-side updates to shared state.