1. Method of automatically identifying in a set of data sequences at least one specific type of information contained in each data sequence of the set, wherein said type of information has an unknown presentation in said data sequences, characterised in that it comprises the steps of: initially defining at least one characteristic feature of said specific type of information, and of expressing said characteristic feature(s) in terms of at least one recognition rule executable by processor means ( 2 ), applying said recognition rule(s) through said processor means to analyse said set of data sequences, determining in each data sequence a data portion thereof satisfying said recognition rule(s), and identifying said data portion as corresponding to said specific type of information.