| http://www.w3.org/ns/prov#value | - As far as recently-released OSs are concerned, it is a matter of common practice to adopt a browser system in which a graphical user interface (hereinafter a GUI) is used to display a hierarchical structure of a file system or the like in a screen, and a pointing device such as a mouse is used to point out intended data, and thus data such as a file is accessed. [0005] In the foregoing known brows
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