| http://www.w3.org/ns/prov#value | - Namely, the electronic paper 12 according to the present embodiment has optical characteristics such that a light reflectance of a portion of the electronic paper 12 on which a document is written (portion at which the density varies by writing a document such as a portion corresponding to characters, of a document which is consisted of characters (hereinafter, ???imaging portion???)) has a light
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