The destroyOnClose attribute specifies you want the view destroyed and all dependencies released when the window closes, even if the parent window remains open. Make sure you set the destroyOnClose attribute before the view is created using one of the open actions.

For more information on the self attribute, refer to Using the self attribute.

The valueHolder attribute holds the value of the variable or class.

The viewPartClass attribute is the part class being wrapped. It is this class that will be instantiated when one of the view creation actions is used.