In generative grammar, non-configurational languages are languages characterized by a flat phrase structure, which allows syntactically discontinuous expressions, and a relatively free word order. History of the concept of "non-configurationality" The concept of non-configurationality was developed by grammarians working within Noam Chomsky's generative framework. Some of these linguists observed that the Syntactic Universals proposed by Chomsky and which required a rigid phrase structure was challenged by the syntax of some of the world's languages that had a much less rigid syntax than that of the languages on which Chomsky had based his studies. The concept was invented by Ken Hale who described the syntax of Warlpiri as being non-configurational. However, the first to publish a description of non-configurationality was Chomsky himself in his 1981 lectures on Government and Binding, in which he referred to an unpublished paper by Hale. Chomsky made it a goal of the Government and Binding framework to accommodate languages such as Japanese and Warlpiri that apparently did not conform to his proposed language universal of Move α. Hale later published his own description of non-configurationality in Warlpiri. Distinction Non-configurational languages contrast to configurational languages, where the subject of a sentence is outside the finite verb phrase (VP) (directly under S below) but the object is inside it. Since there is no VP constituent in non-configurational languages, there is no structural difference between subject and object. The distinction — configurational versus non-configurational — can exist in phrase structure grammars only. In a dependency-based grammar, the distinction is meaningless because dependency-based structures do not acknowledge a finite VP constituent. The following trees illustrate the distinction: Non-configurational languages have a seemingly 'flat' constituent structure, as illustrated above. The presence of the VP constituent in the configurational tree on the left allows one to define the syntactic relations (subject vs. object) in terms of configuration: the subject is the argument that appears outside of the VP, but the object appears inside it. The flat structure on the right, where there is no VP, forces/allows one to view aspects of syntax differently. More generally, Hale proposed that non-configurational languages have the following characteristics: free (or more accurately, pragmatically determined) word order extensive use of null anaphora (pro-drop phenomena) syntactically discontinuous expressions However, it is not clear that those properties all cluster together. Languages that have been described as non-configurational include Mohawk, Warlpiri, Nahuatl, O'odham (Papago), Jingulu, and Jiwarli. Discourse-configurationality Using non-configurationality