| http://www.w3.org/ns/prov#value | - If adequate payment can not be provided, the operation terminates the purchase at an event 420. [0098] If sufficient balance is available on the card or if additional forms of payment have supplemented the payment, the operation progresses to event 422 wherein the approval of the purchase is sent from the money card site to the retailer or merchant site so the purchase may be completed. [0099] The
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