“…But indeed it imposes a severe restriction, which can turn out unacceptable in other contexts: The optical appearance of the text is excluded from the model's substance; the concrete graphical layout only serves as a means for representation, as a carrier for the meant contents; it is accidental, not substantial. This is inadequate for many products of fine arts, starting with ancient stone engravings, designed in equal rights as text message and as graphical ornament, ranging over many kinds of medieval manuscripts, up to the Concrete Poetry and Dadaistic poems of the early twentieth century: In her standard textbook, Pierazzo (2015)[pg.51] quotes a "calligramme" graphic by Apollinaire. In all these examples the concrete graphical appearance is part of the meant substance, not only a necessity for transportation.…”