json_schema: {
      "description": "Specifies relationships between the current document and an external resource.",
      "properties": {
          "href": {
              "description": "A URL. Specifies the location of the linked document.",
              "maxLength": 255,
              "type": "string"
          },
          "method": {
              "description": "Specifies how to send the data (e.g. get, post).",
              "enum": [
                  "get",
                  "post"
              ],
              "type": "string"
          },
          "objectType": {
              "description": "The type of the object, link.",
              "maxLength": 25,
              "type": "string"
          },
          "rel": {
              "description": "Specifies the relationship between the current document and the linked document.",
              "maxLength": 25,
              "type": "string"
          },
          "title": {
              "description": "Provide additional / advisory information (expand on the meaning of the link).",
              "maxLength": 25,
              "type": "string"
          },
          "type": {
              "description": "Specifies the media type of the linked document.",
              "maxLength": 25,
              "type": "string"
          }
      },
      "required": [
          "objectType",
          "href",
          "rel"
      ],
      "title": "link",
      "type": "object"
  }