| http://www.w3.org/ns/prov#value | - In an embodiment such as described in FIG. 1 provides for key set 100 to be symmetrical about the axis Y. This, the strike points 112 may migrate leftward as the key spans negatively along the axis X. The corner keys 102 of the left edge column 149 may include the strike points 112 that are positioned in far left top and bottom corners, so that the distance 118 of those respective keys is about th
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