| http://www.w3.org/ns/prov#value | - For example, a Seller 102 may have as a condition of its listing the requirement that the system obtain certain additional information from a user before providing some or all of its product or service information to a user. [0166] Referring to FIG. 6, when the necessary conditions (e.g., registration or other conditions) are met, the system 30 provides information about the product or service to
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