4.1. JSON

In Xdefinition, you can describe the JSON data model in the "xd:json" element. The name of the model is in the "name" attribute. The model is described as text in JSON format. The Xscript for the data values is written in place of the corresponding data value. The Xscript for maps and arrays is written as the value of "%script".
JSON data:

{ "cities" : [
    { "from": ["Brussels",
        {"to": "London", "distance": 322},
        {"to": "Paris", "distance": 265}
      ]
    },
    { "from": ["London",
        {"to": "Brussels", "distance": 322},
        {"to": "Paris", "distance": 344}
      ]
    }
  ]
}

The Xdefinition will be:

<xd:def xmlns:xd="http://www.xdef.org/xdef/4.2" name="Test" root="Distancies" >
  <xd:json name="test">
    { "cities"  : [
        { %script = "occurs 1..*;",
          "from": [ "string();",
            { %script = "occurs 1..*;",
              "to": "jstring();",  "distance": "int();"
            }
    	  ]
        }
      ]
    }
  </xd:json>
</xd:def>

You can try it HERE