| http://www.w3.org/ns/prov#value | - ng bid-related information, including a quantity for each said type of item within said group of types of items, from said bidder, and means for applying a constraint to the bid-related information to require that a sum of the quantities over said group of types of items is no greater than a sum of the quantities over said group of types of items contained in bid-related information received from
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