Using constraints to enforce complex payment policies

摘要

A method of using constrained payments to enforce complex payment policies in electronic commerce (e-commerce) systems. An order capture component generates at least a first relationship object that corresponds to a first payment constraint rule. If an order item is placed in a shopping cart, and if the order item is associated with one or more payment constraint rules, and if one or more pre-conditions corresponding to the one or more payment constraint rules are satisfied, then the order capture component implements the one or more payment constraint rules. If one or more post-conditions corresponding to the one or more payment constraint rules are satisfied, then the order capture component submits a purchasing order from the shopping cart that includes the order item, such that the order item is constrained by the one or more payment constraint rules.