| http://www.w3.org/ns/prov#value | - id type of item within said group of types of items, from said bidder, and 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 said bidder associated with lower prices in the clock auction. 5.
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