XML

Another thing I want to learn is xml. I have a book called xml by example and I have read most of it, but I think I tried to read it to fast and I also did not practice xml so I don't know much xml. I think if I practice more I will be able to learn xml. It would be great to know xml because it looks like xml can be used with a lot of programming languages although I am not sure. I hope xml is not to hard to lean.