So I am very confused about XML in general. according to the things i read about it, its not a programming language. its not used to display anything. basically they even say it does nothing. then the question arises....WHY is it used?WHERE is it used?and HOW is it used?....i tried reading documents online(i read all the pages on xml in w3schools.com) but none of them made it clear to me as exactly why xml is useful in anyway. And if it is, then how exactly can i use it? I am not able to understand the concept of XML. Any inputs are greatly appreciated :).