I am going through the Graphml primer (http://graphml.graphdrawing/primer/graphml-primer.html) but when I copy and paste the examples into a .graphml file and open them with yEd then they look different. A good example is example 2.41. Open it with yEd and you get a different graph, without coloured nodes and without the labels (1.0, 1.1, 2.0). When I save the yEd graph as a Graphml file and compare it with the example then it is completely different. What is going on?