1. Method for the editing of three-dimensional graphic models, including: preparing a three-dimensional graphic model, including a plurality of structural elements, each associated with one or more of the other structural elements according to a data structure, said data structure including sufficient data for a complete description of said three-dimensional model; generating one or more items of additional data, said additional data representing geometrical and/or positional and/or semantic links between said structural elements; receiving at least one modifying signal, representing a modification to be made on at least one predetermined structural element; modifying, in accordance with said modifying signal, the predetermined structural element and the structural elements associated therewith according to said data structure and said additional data, obtaining a corresponding modified three-dimensional model.