I would like to be able to model business use-cases using the notation with chords rendered in the actor heads use-case ovals. (see http://www.mathinee.com/content/essential/102827 and http://www.uml-diagrams.org/restaurant-uml-use-case-diagram-example.html ).
I see this feature request as related to http://plantuml.sourceforge.net/qa/?qa=3274/skin-for-other-diagram-types-than-activity-diagrams&show=3290#c3290.
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