json_schema: {
      "$schema": "http://json-schema.org/draft-04/schema#",
      "id": "http://example.phpsx.org/population#",
      "title": "entity",
      "description": "Represents an internet population entity",
      "type": "object",
      "properties": {
          "id": {
              "type": "integer",
              "description": "Unique id for each entry"
          },
          "place": {
              "type": "integer",
              "min": 1,
              "max": 64,
              "description": "Position in the top list"
          },
          "region": {
              "type": "string",
              "minLength": 3,
              "maxLength": 64,
              "pattern": "[A-z]+",
              "description": "Name of the region"
          },
          "population": {
              "type": "integer",
              "description": "Complete number of population"
          },
          "users": {
              "type": "integer",
              "description": "Number of internet users"
          },
          "worldUsers": {
              "type": "number",
              "description": "Percentage users of the world"
          },
          "datetime": {
              "type": "string",
              "format": "date-time",
              "description": "Date when the entity was created"
          }
      },
      "required": [
          "place",
          "region",
          "population",
          "users",
          "worldUsers"
      ]
  }