| http://www.w3.org/ns/prov#value | - side C are connected by the communication network 10 such as a network, the Internet or a public circuit, and various kinds of information such as the facility state detecting information and a diagnostic report mutually exchanged between them is rendered as the electronic file and is sent and received by e-mail and so on. [0034] Reference numeral 9 in FIG. 3 denotes a firewall installed between
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