| http://www.w3.org/ns/prov#value | - As a result, in particular embodiments, mobile drive unit 20 e may, at particular times during its movement along segment 17 x, occupy a portion of the same cell 14 as mobile drive unit 20 e, as shown in FIG. 12E. Thus, the modified reservation policies shown in FIGS. 12C-12E allow for mobile drive units 20 traveling in the same direction to follow one another with a much smaller distance separati
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