OpenBP activity object that executes a user interface template (the actual implementation of the visual) and writes the result of the execution to the request output stream. The type of the visual implementation depends on the user interface engine. A visual implementation might be a Java Server Page (JSP) or a Velocity template for example. The UI node will store a compiled version of the visual implementation (if the user interface engine supports this) to increase performance.
@author Heiko Erhardt
Model of several resources that should be displayed as a visual item in the view. The VisualItem provides the highlighting and selection status, enables {@link ViewContentDisplay}s to store a display object, and facilitates the resolution of {@link Slot}s.
@author Lars Grammel
@see VisualizationModel
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