| http://www.w3.org/ns/prov#value | - At step 520, based, at least in part, on the VSUI, the VCS or ACS performs an action such as selecting and transmitting advertisement to a particular user or for presentation on a nearby presentation device (e.g., computer monitor and speakers), which may include a coupon, refund, rebate and/or other offer (e.g., an incentive) to selected users, notifying vender personnel that a preferred customer
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