The Poetic Function in the Theory of Roman Jakobson

0.0 "WHAT MAKES A VERBAL MESSAGE A WORK OF ART?" (RJ 1960:350) What is it that differentiates a poetic text from a non-poetic text? What makes poetic discourse different in kind from other types of discourse? In other words, what are the intrinsic linguistic properties of the text which makes it a poem: what is there about the internal structure of a poem which 'announces' that it is a poem? What is characteristic of 'poetic' elements in prose and in 'ordinary' language? What in fact is the poetic function of language?