| http://www.w3.org/ns/prov#value | - A buyer device 20 and/or a merchant device 30 may be, for example, a Personal Computer (PC), a portable computing device such as a Personal Digital Assistant (PDA), a wired or wireless telephone, a one-way or two-way pager, a kiosk, a Point of Sale (POS) terminal, a Credit Authorization Terminal (CAT) device, an Automated Teller Machine (ATM) device, a shopping cart device, a smart or magnetic str
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