| http://www.w3.org/ns/prov#value | - The symbol information can be applied to icon corresponding to the data format of the digital content. [0078] For example, the respective symbol information may be used with the image data such as icon, and for example, as shown in a data table of FIG. 8, the respective symbol information can be defined in correspondence with the expansion factor based on the data kind, the symbol information and
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