| http://www.w3.org/ns/prov#value | - Sensors such as 810 (optical) and 811 (Hall-effect) carried on the X-Y shuttle table can be used to sense, for example: (1) a home or first garage position; (2) one or more workstation positions; (3) a bar code reader position; (4) a portal position or (5) presence of a tray on the shuttle table or in a garage or workstation.
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