| http://www.w3.org/ns/prov#value | - In FIG. 2???FIG. 4B, a user such as consultants of civil engineering, construction companies, the Ministry of Construction, public corporations and local governments starts up a browser on terminal device (abbreviated to PC) 20 a of the user side and accesses a Web page offered by Web page processing unit 11 in server 10 via computer network (abbreviated to network) 30 (in the step 401).
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