| http://www.w3.org/ns/prov#value | - {(refl)A, (refl)N, (refl)S, (refl)E, (refl)W}]i The term {(refl)A, (refl)N, (refl)S, (refl)E, (refl)W} represents reflective data for the frexel i under ambient lighting conditions, and for each of four light sources, such as LEDs, which are arbitrarily designated as north-south-east-west for ease of discussion.
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