| http://www.w3.org/ns/prov#value | - The system (10) is arranged to perform operations including at least one of delete, read, write, and rearrange data content associated with said at least one token (80) to read from said at least one token (80) using the token interfacing means (60, 70) details of said data content to identify said data content and/or to record on said at least one token (80) using the token interfacing means (60,
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