schema.json

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