An automated method for conditionally propagating metadata instances among documents includes defining groups of metadata instances and includes assigning different propagation coefficients to each group. A seller initially establishes a deal structure for a product, which provides seller defined selling criteria information relating to the purchasing of the product, such as volume per unit price, quality, delivery time and warranty information. The carton has top, front, rear, bottom and end walls. The first edge of the first plate area and a second edge of the first plate area opposite to the first edge of the first plate are extended to form at least one slot structure.