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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	Posted a reply to Impossible to make billing Postcode not required, on the site WordPress Support Forums:...then you have to create a hook there are a example Make phone number not??? 2 years ago
http://www.w3.org/ns/prov#wasQuotedFrom	wordpress.org