Gordon Forsythe

I agree completely. Just saying that JSON doesn't have that extra layer of complexity unless you build it into your data structures. For example: "<mytag type='thing' operator='add'><item>3</item><item>4</item></mytag>" would translate to something like: myjson = {type:'thing',operator:'add',items:[3,4]}. So yes, JSON is much simpler. Still, there are pros and cons to both, just like everything else.

The main reason you'd want XML is if you need that extra layer of complexity to your data...granted, you can do "attributes" in your json if you structure your data that way.