 Linguistic models in MTT operate on the principle that language consists in a mapping from the content or meaning (semantics) of an utterance to its form or text (phonetics).Intermediate between these poles are additional levels of representation at the syntactic and morphological levels.Representations at the different levels are mapped, in sequence, from the unordered network of the semantic representation (SemR) through the dependency tree-structures of the syntactic representation (SyntR) to a linearized chain of morphemes of the morphological representation (MorphR) and, ultimately, the temporally-ordered string of phones of the phonetic representation (PhonR) (not generally addressed in work in this theory).