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In linguistics, X-bar theory is a model of phrase-structure grammar and a theory of syntactic category formation [1] that was first proposed by Noam Chomsky in 1970 [2] reformulating the ideas of Zellig Harris (1951 [3]), and further developed by Ray Jackendoff (1974, [4] 1977a, [5] 1977b [6]), along the lines of the theory of generative grammar put forth in the 1950s by Chomsky.
[1] [2] It contains the now-famous sentence "Colorless green ideas sleep furiously", [3] which Chomsky offered as an example of a grammatically correct sentence that has no discernible meaning, thus arguing for the independence of syntax (the study of sentence structures) from semantics (the study of meaning). [4] [note 1]
Grammatical particle. In grammar, the term particle ( abbreviated PTCL) has a traditional meaning, as a part of speech that cannot be inflected, and a modern meaning, as a function word (functor) associated with another word or phrase in order to impart meaning. Although a particle may have an intrinsic meaning and may fit into other ...
The difference occurs for all nouns of multitude, both general terms such as team and company and proper nouns (for example where a place name is used to refer to a sports team). For instance, BrE: SuperHeavy is a band that shouldn't work or First Aid Kit are a band full of contradictions; [6] [7] AmE: The Clash is a well-known band.
Grammatical relation. A tree diagram of English functions. In linguistics, grammatical relations (also called grammatical functions, grammatical roles, or syntactic functions) are functional relationships between constituents in a clause. The standard examples of grammatical functions from traditional grammar are subject, direct object, and ...
For example, the language of even-length palindromes on the alphabet of 0 and 1 has the linear grammar S → 0S0 | 1S1 | ε. An arbitrary string of this language cannot be parsed without reading all its letters first which means that a pushdown automaton has to try alternative state transitions to accommodate for the different possible lengths ...
e. In linguistics, grammaticality is determined by the conformity to language usage as derived by the grammar of a particular speech variety. The notion of grammaticality rose alongside the theory of generative grammar, the goal of which is to formulate rules that define well-formed, grammatical sentences. These rules of grammaticality also ...
For example, the simple grammar S → A + A A → 0 | 1 is an unambiguous grammar for the language { 0+0, 0+1, 1+0, 1+1 }. While each of these four strings has only one leftmost derivation, it has two different derivations, for example S ⇒ A + A ⇒ 0 + A ⇒ 0 + 0 and S ⇒ A + A ⇒ A + 0 ⇒ 0 + 0 Only the former derivation is a leftmost one.