Introduction
Think of this like the query window Sql manager, a way to write your XPath query and see the results of it. It also provides a nice view of what's going on.
Background
If you don't understand XPath please read the refrence here and test it out with the tool.
http://msdn.microsoft.com/en-us/library/ms256086.aspx
Using the code
Since there is still no way to paste code to into this article in an easy way I will post each individual tough nugget in an seperate tip and trick where the editor works.
Thanks for your patience!