Learning about XPath

I am someone who learns by example. I’m currently looking for tools to test/to visualise Xpath query. I suppose I can read Xpath specification, of which I do try to read, but yeah, I guess it’s simpler if just see the examples. nnUpdate: Urgh, after 2-3 hours (with watching Australian Idol+skithouse) I was able to complete the tutorial on XPath, I also managed to download and use XMLSpy to check my answer. There are few other free tols that I downloaded, but I couldn’t run them. I wonder whether there is something similar to XMLSpy in Linux (XMLSpy is a free for limited time). Now that the tute is done, I can (try to) concentrated on the assignment. I have to brush up my C.. sigh.. leaving the comfort of Java..