The solution and the examples don't match at all. Literature seems irrelevant as well. You might want to clean up this pattern a bit, the others on this site are much more clear and useful.
Dimitri Visser, 16th February 2010
I concur with Tyler Wright. I was looking for some old fashioned examples of the tree navigation pattern
Keith Gill, 26th January 2011
One of the most notable instances of the Tree Navigation pattern would have to be that of the Windows "Explorer" pane.