json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "id": "http://jvm-bloggers.com/",
      "type": "object",
      "properties": {
          "bloggers": {
              "type": "array",
              "_uniqueItems": true,
              "description": "An array of bloggers' data",
              "items": {
                  "type": "object",
                  "properties": {
                      "bookmarkableId": {
                          "type": "string",
                          "description": "The unique identifier of the blogger within the file"
                      },
                      "name": {
                          "type": "string",
                          "minLength": 2,
                          "description": "Blogger name"
                      },
                      "rss": {
                          "type": "string",
                          "pattern": "^https?://[^ ]+$",
                          "description": "Valid URL to the blogger's RSS feed"
                      },
                      "twitter": {
                          "type": "string",
                          "pattern": "^@(\\w){1,15}$",
                          "description": "Optional blogger's twitter id"
                      }
                  },
                  "required": [
                      "bookmarkableId",
                      "name",
                      "rss"
                  ]
              }
          }
      },
      "required": [
          "bloggers"
      ]
  }