An electronic purse is a card that stores value and can be used to pay for travel or other small-scale transactions in a similar way to cash. The secure information stored in a dedicated area or file on the smart-card is the electronic "purse."
The term "electronic data interchange" (EDI) refers to the exchange of business documents between business partners in a standard electronic format. Invoices, advance ship notices, and purchase orders are examples of common documents that are exchanged using EDI.
