| http://www.w3.org/ns/prov#value | - For example, a transmitting recording unit can be adapted to transmit communicative information that causes emission of an audible tone, display of a visual cue (e.g., lighting of an LED indicator) and/or production of a haptic sensation (e.g., vibration, using mechanisms such as have been used in cell phones or pagers) by a receiving recording unit, such tone and/or visual cue having a predetermi
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