Visual Speciication of Interprocess and Intraprocess Communication Visual Speciication of Interprocess and Intraprocess Communication

We present a visual speciication language for constructing distributed applications and their direct manipulation graphical user interfaces. Each distributed application consists of a collection of independent modules and a connguration of logical connections that deene communication among the data interfaces of the modules. Our speciication language uses a single visual mechanism that allows end-users to deene interprocess communication among distributed modules and to deene intraprocess communication among objects within a module. This seamless speciication provides a general encapsulation/abstraction mechanism and is designed to support dynamic change to the communication structure. User interfaces are completely decoupled from the module(s) they control.