| http://www.w3.org/ns/prov#value | - In the processor DP, the exact referencing of the coordinate system represented by axes 25 and 26 with their crossover point 29 and orthogonal axis 27 can be determined by further fiducial points on the anatomy itself, e.g. markers, spots or points 8A, 8B, and 8C. Natural anatomical fiducial points also may be used such as the tip of the nose, the ears or other bony landmarks.
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