2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/87046We discuss the nature and a general formulation of the relativity principle and we show that it can be justified starting from a strictly operational point of view. We give some remark on the connection with the spacetime symmetry groups. We also propose that the relativity principle can be considered as a definition of physics, that distinguishes it from the other scientific disciplines.10 pages, no figure, LATEXClassical Physicstext