And just as prosody undoubtedly contributes to the meaning of utterances, so too does a text's graphical presentation contribute to its meaning.
although there is a long tradition and rich linguistic framework for describing and representing speech prosody (e.g., Halliday 1967;Chomsky and Halle 1968;Crystal 1969;Bolinger 1972;Pierrehumbert 1980;'t Hart, Collier, and Cohen 1990;Ladd 1996), the same is not true for text layout.