Syntax

X-bar theory

X-bar theory

What is X-bar theory?

Development theoretical within the grammar generative proposed by Noam Chomsky (1970) which consists in the inclusion of categories of level means positioned between the categories minimum (the category dictionary) and the categories maximum (the categories syntagmatic). These developments were reflected in change in the formalism of representation syntactic pre existing, that has to be designated by convention X-Bar .

The phrases have schemes syntactic abstract in that it recognizes three levels of hierarchy, in time of two (the categories lexical – N, V, P, Adj, Adv and the categories syntagmatic – SN, SV, SP, Sadj, SAdv ), as happened in the early formulations of generative grammar There are thus three levels of projection syntactic to from the categories lexical V (erbo), C (OMe), A (djectivo) and R (reset). The projection syntax of level 1 is the result of the combination of category lexical with the your add – on sand is designated by the notation X ‘, being that X is one variable that can be filled by one category N’, V ‘, A’ or P ‘. The projection syntax of level 2 is the result of the composition of the category X ‘ (obtained by the first projection) with the specifier the category lexical in question, representing up by the notation X ” (variable that can be updated by N”, V ” A”, P ”). The specifiers not make part of the composition of the categories lexical or either can be categories lexical, but serve them of modifiers. The abstract configuration of the X-Bar theory will be thus represented by the scheme:

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The X-bar theory is a linguistic theory that seeks to identify syntactic principles common to all languages . According to this theory, all languages ​​would share certain structural similarities in their way of forming sentences .

The letter X symbolizes an arbitrary lexical category ; when a precise expression is analyzed, a specific lexical category is assigned instead of the X , and the X can become an N (by name ), a V (by verb ) or a P (by preposition )

The term X-bar derives from the notation used. Some structures are represented by X (an X with a bar on it), or in some cases X ′, for easier typographic (we read “x-barra”). The XP notation stands for “syntax X” and is equivalent to “x-bar slash” or “x double slash” (X with a double slash above it) or X “.

x-bar-theory

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