| http://www.w3.org/ns/prov#value | - ication table 411; FIGS. 7 to 10 are timing diagrams of time control operations of the user apparatus indicated by FIGS. 4 and 5; FIG. 11 is a diagram illustrating an additional construction of the distributor apparatus in the first embodiment of the present invention; FIG. 12 is a diagram illustrating an example of construction of a supplier apparatus in the second embodiment of the present inven
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