1. Method of enriching a transcription rule database of a first database management server, said method including the following steps: in a transcriber terminal connected to said first database management server, transcribing a trace stored in a second database management server connected to said transcriber terminal into a transcribed trace to be stored in said second database management server, and validating said transcribed trace by applying transcription rules stored in said transcription rule database, transmitting a control message including an identifier of said transcribed trace from said transcriber terminal to an administrator terminal that is coupled to said first database management server and second database management server if said transcribed trace is invalidated, checking in said administrator terminal whether the invalidated transcribed trace corresponding to said identifier transmitted must be accepted as a validated transcribed trace, and constructing in said administrator terminal a transcription rule and adding it to said transcription rule database in order for said invalidated transcribed trace thereafter to be considered as a transcribed trace validated in the validating step.