Distributed Morphology

In generative linguistics, Distributed Morphology is a theoretical framework introduced in 1993 by Morris Halle and Alec Marantz. The central claim of Distributed Morphology is that there is no divide between the construction of words and sentences. The syntax is the single generative engine that forms sound-meaning correspondences, both complex phrases and complex words. This approach challenges the traditional notion of the Lexicon as the unit where derived words are formed and idiosyncratic word-meaning correspondences are stored. In Distributed Morphology there is no unified Lexicon as in earlier generative treatments of word-formation. Rather, the functions that other theories ascribe to the Lexicon are distributed among other components of the grammar.

The basic principle of Distributed Morphology is that there is a single generative engine for the formation of both complex words and complex phrases; there is no division between syntax and morphology and there is no Lexicon in the sense it has in traditional generative grammar. In fact, Distributed Morphology completely rejects the notion of a lexicon in the way it had been used. Any operation that would occur in the 'lexicon' according to lexicalist approaches is considered too vague in Distributed Morphology, which instead distributes these operations over various steps and lists.

In contrast to lexicalist models of morphosyntax, Distributed Morphology posits three steps in building an utterance: first, the Formative List provides the input for syntax, followed by the syntactic operations themselves, then the Exponent List is consulted to provide the utterance with phonological content. The term Distributed Morphology is thus used because the morphology of an utterance is the product of operations distributed over more than one step, with content from more than one list.

There are three relevant lists in Distributed Morphology: the Formative List, the Exponent List (Vocabulary Items), and the Encyclopedia. Items from these lists enter the derivation at different stages.

The formative list, sometimes called the lexicon (this term will be avoided here) in Distributed Morphology includes all the bundles of semantic and sometimes syntactic features that can enter the syntactic computation. These are interpretable or uninterpretable features (such as [+/- animate], [+/- count], etc.) which are manipulated in syntax through the traditional syntactic operations (such as Merge, Move or Agree in the Minimalist framework). These bundles of features do not have any phonological content; phonological content is assigned to them only at spell-out, that is after all syntactic operations are over. The Formative List in Distributed Morphology differs, thus, from the Lexicon in traditional generative grammar, which includes the lexical items (such as words and morphemes) in a language.

...
Wikipedia