{
  "modelName":"Prepop from URL example",
  "title": "Pre-pop from URL example",
  "dataModel": [
    {
      "dataType": "text",
      "name": "item1"
    },
    {
      "dataType": "text",
      "name": "item2"
    }
  ],
  "viewModel": [
    {
      "type": "row",
      "items": [
        {
          "type": "col",
          "items": [
            {
              "type": "text",
              "source": "item1",
              "preLabel":"Item 1"
            },
            {
              "type": "text",
              "source": "item2",
              "preLabel":"Item 2"
            }
          ]
        }
      ]
    }
  ],
  "pre-populate": [
    {
      "source": {
        "url": "preview/prepopulate",
        "params" : [
          {
            "name":"p1",
            "value":"1"
          },
          {
            "name": "p2",
            "type": "computed",
            "expression": "activityData.value2"
          }

        ]
      },
      "mapping": [
        {
          "source-path": "p2",
          "target": "item2"
        },
        {
          "source-path": "p1",
          "target": "item1"
        }
      ]
    }
  ]
}