| http://www.w3.org/ns/prov#value | - here is a news release page; you will get the idea of exactly how common these sytems are, in general, as well as the various types of systems that can be installed and the various applications for the data generated. http://www.irdinc.com/english/html/ir/news/index .h tm You may have to fix the link, I can not seem to properly display the end where it shows as h[space]tm instead of htm As far as the r
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