What is "shelem"

Shelem( Shělěm), also called Rok or similar, is an Iranian trick-taking card game with four players in two partnerships, bidding and competing against each other. It is similar to Spades and Hokm, but bidding and trump are declared in every hand by the bidding winner. Both the name and the point structure of this game are similar to the American game Rook, there being a possible connection between the two games, although it is not clear as from which game it derives.