| http://www.w3.org/ns/prov#value | - Furthermore, while the receiver may have a keyhole or lock as described for the embodiment of FIGS. 3A-3B below, preferably any form of releasable latch or lock is an entirely invisible or concealed one (such as a magnetically operated latch) or one which does not appear lock-like (such as a latch actuated by a specially-shaped plastic member unlike a conventional key).
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