I’m not a big fan of XML. It’s a bit heavy and dense, and though it’s effective, I just prefer JSON.
But what IS Json? Well I’m not going to cover that, but some people smarter than I have already answered that question, so have a look over here and come back when you’re done.
If you’ve never used it, it may take a while to wrap your head around the inception-like dictionary-within-a-dictionary structure. But after you serialize and deserialize some data, you’ll get an idea of how it works.