| http://www.w3.org/ns/prov#value | - A formation method of a two-dimensional code according to a first aspect of the present invention is a method for forming the two-dimensional code, where unit cells each of which is in a dark or bright pattern are arranged in a matrix, on a marking surface by laser burning, the method comprising the steps of storing a bright or dark cell as an element of a two-dimensional array having a value of 0
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