| http://www.w3.org/ns/prov#value | - The main frame unit 21 comprises, as shown in FIG. 3, a CPU 211 for executing a various types of program, a main memory 212 in which a program stored in a hard disk unit 213 is read out and developed for execution by the CPU 211, the hard disk unit 213 for saving various types of programs and data, an FD drive 214 for accessing a floppy disk 100 mounted thereon, a CD-ROM drive 215 for accessing a
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