{
   "$schema":"http://json-schema.org/draft-04/schema#",
   "title":"Web syndication",
   "description":"Complex Network",
   "type":"object",
   "properties":{
      "id":{
         "description":"The unique identifier of one observation",
         "type":"integer"
      },
      "source_type":{
         "description":"phpbb2, phpbb3, s24, twitter, wordpress",
         "type":"string"
      },
      "snapshot_time":{
         "description":"time of taking snapshot of data",
         "type":"string"
      },
      "source":{
         "description":"main webpage url",
         "type":"string"
      },
      "url":{
         "description":"particular webpage url",
         "type":"string"
      },
      "category":{
         "type":"string"
      },
      "title":{
         "type":"string"
      },
      "topic":{
         "type":"string"
      },
      "text":{
         "description":"main content",
         "type":"string"
      },
      "time":{
         "description":"time of submit",
         "type":"string"
      },
      "user":{
         "description":"unique identifier of user in particular source",
         "type":"string"
      },
      "other_details":{
         "description":"details characteristic for particular source",
         "type":"object",
         "properties":{
            "likes":{
               "description":"number of likes on Facebook",
               "type":"integer"
            },
            "tweets":{
               "description":"number of tweets on Twitter",
               "type":"integer"
            },
            "gplus":{
               "description":"number of pluses on google+",
               "type":"integer"
            },
            "comments":{
               "description":"number of comments",
               "type":"integer"
            },
	    "author_name":{
               "description":"name of user",
               "type":"string"
            }
         }
      },
      "required":[
         "id",
         "source_type",
         "snapshot_time",
         "source",
         "url",
         "text",
         "time",
         "user"
      ]
   }
}