This article proposes to review the theoretical and methodological path of the research programme Médias et mobilisations en Corse de 1945 à nos jours (https://sites.ina.fr/mobilisations-en-corse). From its first stages to its extensions, the objective was to give it a semiotic dimension essential to its elevation as a heritage while following the initial guideline, that of a thought forged by the question of triviality by Yves Jeanneret and inscribed more broadly in the line of the Sciences of the Information and the Communication.