  The central role of the lexicon in Meaning-Text Theory (MTT) and other
dependency-based linguistic theories cannot be replicated in linguistic
theories based on context-free grammars (CFGs). We describe Tree Adjoining
Grammar (TAG) as a system that arises naturally in the process of lexicalizing
CFGs. A TAG grammar can therefore be compared directly to an Meaning-Text Model
(MTM). We illustrate this point by discussing the computational complexity of
certain non-projective constructions, and suggest a way of incorporating
locality of word-order definitions into the Surface-Syntactic Component of MTT.
