Nodes of Application
Nodes for the subsystem which contains Nodes of Table and Nodes of Function.

Application(Subsystem List)
Select this node to list subsystem definitions in content pane. Use context-menu to add a new definition of subsystem.

Subsystem
Subsystem is a software component that contains tables and functions. Select the node of subsystem to edit name or descriptions(you can not change subsystem ID). You can change owner subsystem of tables/functions by drag-dropping them into tables/functions list of target subsystem.

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