Abstract
Relational OBject Architecture (ROBA) is a software architecture designed for efficient management of user interface objects in the Mugen system [LHMM89]. Mugen, created at IBM's Tokyo Research Laboratory, is a prototype system for an application development environment, which has the paradigm of generating new applications from provided existing integrated applications. Figure 1 shows a dialogue panel of a new application created in Mugen. There are three boxes for entry points of tasks. A user can dynamically change, add, or delete a task box through Mugen's user interface system, which has the following features: (1) the user interface is created in a WYSIWYG manner, and (2) the layout object can link to a task, which carries out a recorded sequence of a user's operations on applications. The system for building a user interface in Mugen is called the user interface enabler .
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