| http://www.w3.org/ns/prov#value | - his principle, merchants may place impulse items, such as gum and the like, near a grocery store checkout counter or may suggest the purchase of french fries following a consumer's order of a hamburger. [0006] Yet, while such approaches may be effective where a consumer is already engaged in a transaction with the merchant, significant obstacles remain in situations where transactional activity is
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