title: Grouping output edges from graphviz
body: <p>I'm trying to draw a graph with two kinds of edges, and I want the two kinds of edges to link to each node from opposite sides, as much as possible.  I.e. if an edge of type A enters from the left, I want all edges of type B to exit to the right.  I know I could specify compass directions, but I'd like graphviz to be able to switch this around to minimize graph clutter.</p>
  
  <p>Is it this, or something similar, possible?</p>