Discussions about XML and JSON often remind me of this comment on HN: https://news.ycombinator.com/item?id=5702868

Partial quote:

> XML can certainly be shorter than JSON and often is, and repeated tags are the best showcase for it:

     <user id="abc">
        <phoneNo type="home">123456789</phoneNo>
        <phoneNo type="work">321654987</phoneNo>
    </user>

> This turns into this beautiful JSON:

     [
      "users": [
	{
	  "id": "abc",
	  "phoneNos": [
	    { "type": "home", "value": "123456789" }, 
	    { "type": "work", "value": "321654987" }
	  ]
	}
      ]
    ]