| http://www.w3.org/ns/prov#value | - nnection is often not free). [0028] According to another aspect the invention comprises a mobile telephone or other portable telecommunications device capable of performing the role of an advertiser device or a consumer device in any of the previous methods. [0029] The device may be capable of performing both the role of an advertiser device and of a consumer device. [0030] The portable telecommun
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