From: "Kim T." <kim.toms@...>
Date: 2010-12-22T06:20:51+09:00
Subject: Re: Graphs with decorated edges

Using GRATR, you can add labels to the edges of the graph by adding a 
third parameter when you do that add_edge! which is a Hash of options 
for that edge.  E.g. g.add_edge!(node1, node2, :label => "My edge 
label")

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