| http://www.w3.org/ns/prov#value | - More precisely, the invention relates to a system for the exchange of data by electromagnetic waves between a fixed station, called a reader, and a mobile station, called a badge, each of these two stations including at least one modem, or modulator/demodulator, connected to a transmission/reception antenna of said data, said system being one wherein at least the badge includes an oscillator in it
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