The first edition of DDD, published in the summer of 1995, had to go through two printings in order to meet the demands of the market. The success of the book, also in terms of its academic standing, is a source of pride and gratitude for the editors and the many contributors. The ongoing demand for DDD provided its editorial team also with an excellent opportunity to take a fresh look at the first edition in view of the preparation of a second, revised, edition. Many of the lacunae and occasional errors in DDD¹, signalled to us by friends and colleagues, could thus be repaired. The pre…