anchor.diff:    events: [ShowEventType]
   
     # A formatted description of the start to end dates
  -  exhibitionPeriod: String
  +  exhibitionPeriod(
  +    # Formatting option to apply to exhibition period
  +    format: ExhibitionPeriodFormat
  +  ): String
   
     # If the show is in a Fair, then that fair
     fair: Fair
  
positive.code:   ): String
  
    # A formatted description of the start to end dates
    exhibitionPeriod: String
  
    # The exhibitors with booths in this fair with letter.
    exhibitorsGroupedByName: [FairExhibitorsGroup]
  
negative.code:   UPCOMING
  }
  
  enum ExhibitionPeriodFormat {
    # Long formatted period e.g. February 25 – May 24, 2015
    LONG
  
    # Short formatted period e.g. Feb 25 - May 24, 2015
    SHORT
  }
  
  type External {
    auctionHouses(size: Int, term: String): [ExternalAuctionHouse!]!
    fairs(size: Int, term: String): [ExternalFair!]!
  