Is it possible to draw feature diagrams?
Most of the visual elements are already possible, only the grouped edges for the "Or" or "Alternative" relation of a feature diagram are missing:
I'm able to somehow reproduce the most notation elements, but now the "Or" or "Alternative" notation:
rectangle "E-Shop" as eshop
rectangle "Bank Transfer" as banktransfer
rectangle "Credit Card" as creditcard
eshop --@ Catalog
eshop --@ Payment
eshop --@ Security
eshop --0 Search
Payment -- banktransfer
Payment -- creditcard
Security -- High
Security -- Standard
Below as a comment I proposed a syntax for the feature diagrams.