Doesn&#x27;t sound very convincing. What&#x27;s the significant difference between those technologies? Both JSON and XML represent trees, they both allow to validate structure, specify a location on the tree. Why JSON is &quot;data format&quot;, and XML &quot;language&quot; - and what is the difference between these two concepts?<p>I feel a bit sorry for XML. A modern evolution of SGML, which pursued ideas of reliable data storage for decades, XML was an attempt to be user-friendly, to be easy to deal with manually. It was after all rather similar to HTML, on appearance.<p>However, XML is too verbose for automated processing, and too inconvenient for manual work today when there is JSON - or other more &quot;humane&quot; formats. So it seems it&#x27;s on the way out.