| http://www.w3.org/ns/prov#value | - BRIEF DESCRIPTION OF THE DRAWINGS [0012] The foregoing and other objects, aspects and advantages will be better understood from the following detailed description of a preferred embodiment of the invention with reference to the drawings, in which: [0013]FIG. 1 is a schematic diagram showing a typical centralized server known in the prior art; [0014]FIG. 2 is a schematic diagram showing the distrib
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