GraphViz, grouping the same edges

Question

digraph G {   a -> b [ label = "foo" ];   a -> b [ label = "bar" ]; } 

This will create two edges between the 'a' and 'b' nodes. Is there a way to have only one edge (group them)?

Answer 1

The "strict" keyword may help you.

strict digraph G {   a -> b [ label = "foo" ];   a -> b [ label = "bar" ]; } 

This will combine the edges. But I believe it will only apply the first label.