`{
      "products": {
        "product": [
          {
            "sku": "$sku",
            "category": [
              {
                "id": "$category_id1",
                "name": "$category_name1",
                "url": "$category_url1",
                "image_url": "$category_image_url1"
              }
            ],
            "specifications": "$specifications"
          }
        ]
      }
    }`