| http://www.w3.org/ns/prov#value | - Additional benefit is gained by the creation of a database of RE system manufactures and installers which can be used to track product use online, while also offering an inexpensive way for manufacturers and installers to advertise themselves to prospective buyers. [0015] Features of the invention can be implemented in numerous ways, including as a system, a method, a computer site, or a computer
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