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Category Properties 
· description
Texts of the respective categories. You can statically specify this property value at design time or bind it to a context attribute so that the value is provided automatically by the context at runtime.
· eventID
ID used to specify the event from which the object is triggered.
· tooltip
Quick info text that appears when the user passes the mouse pointer over the UI element. If Screen Reader is supported, extra text is added automatically to the tooltip in order to support accessibility.