| http://www.w3.org/ns/prov#value | - Referring to FIG. 20, there are provided at each address of the area, fields for storage of a menu code assigned to a certain menu, a main material code for specifying a material (a main material) used in the menu, two submaterial codes for specifying materials except the main material used in the dish, a dish appearance video code for specifying an image of the completely cooked menu, and the num
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