About: http://webisa.webdatacommons.org/405628897

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	The method as in claim 18, wherein one of said codes is a validation code and the step of providing the code to the POS machine comprises scanning the validation code using a device associated with the POS machine.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com