“…The linear representations are characterized by a series of properties which, for sake of consistency, are reviewed in Appendix A. They include the grading of the fields (in physical terms, their mass-dimension), the length and the field content of the supermultiplets [2,4], the dressing transformations [14,15,2], the association with graphs [3,5,6,9,10,11], the connectivity symbol [9,10] characterizing inequivalent representation with a given field content (the notion of inequivalent representations has been discussed in [5,6]), the mirror duality [8], etc.…”