anchor.diff:    webVisit: Int
   }
   
  +enum ArticleTypeEnum {
  +  TEXT
  +  IMAGE
  +  VIDEO
  +  AUDIO
  +}
  +
   input ListArticleFilter {
     """Show only articles created by a specific app."""
     appId: String
  
positive.code: 
    """List the articles with replies of certain types"""
    replyTypes: [ReplyTypeEnum]
  }
  
  """
  
negative.code:     """List only the activities between the specific time range."""
      dateRange: TimeRangeInput
    ): [Analytics]
  
    """Message event type"""
    articleType: ArticleTypeEnum!
  
    """Attachment of this article"""
    attachmentUrl: String
  
    """Attachment hash to search or identify files"""
    attachmentHash: String
  }
  
  """Basic entity. Modeled after Relay's GraphQL Server Specification."""
  