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Context-free may refer to: *
Context-free grammar In formal language theory, a context-free grammar (CFG) is a formal grammar whose production rules can be applied to a nonterminal symbol regardless of its context. In particular, in a context-free grammar, each production rule is of the fo ...
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Deterministic context-free grammar In formal grammar theory, the deterministic context-free grammars (DCFGs) are a proper subset of the context-free grammars. They are the subset of context-free grammars that can be derived from deterministic pushdown automata, and they generate the ...
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Generalized context-free grammar Generalized context-free grammar (GCFG) is a grammar formalism that expands on context-free grammars by adding potentially non-context-free composition functions to rewrite rules. Head grammar (and its weak equivalents) is an instance of such a G ...
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Probabilistic context-free grammar In theoretical linguistics and computational linguistics, probabilistic context free grammars (PCFGs) extend context-free grammars, similar to how hidden Markov models extend regular grammars. Each production is assigned a probability. The probabil ...
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Synchronous context-free grammar Synchronous context-free grammars (SynCFG or SCFG; not to be confused with stochastic CFGs) are a type of formal grammar A formal grammar is a set of Terminal and nonterminal symbols, symbols and the Production (computer science), production rul ...
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Context-free language In formal language theory, a context-free language (CFL), also called a Chomsky type-2 language, is a language generated by a context-free grammar (CFG). Context-free languages have many applications in programming languages, in particular, mos ...
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Deterministic context-free language In formal language theory, deterministic context-free languages (DCFL) are a proper subset of context-free languages. They are context-free languages that can be accepted by a deterministic pushdown automaton. DCFLs are always unambiguous, meanin ...


See also

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Context (disambiguation) Context is the relevant constraints of the communicative situation that influence language use, language variation, and discourse summary. Context may also refer to: Computing * Context (computing), the virtual environment required to suspend a ...
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Free (disambiguation) Free may refer to: Concept * Freedom, the ability to act or change without constraint or restriction * Emancipate, attaining civil and political rights or equality * Free (''gratis''), free of charge * Gratis versus libre, the difference betw ...
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Quoting out of context Quoting out of context (sometimes referred to as contextomy or quote mining) is an informal fallacy in which a passage is removed from its surrounding matter in such a way as to distort its intended meaning. Context may be omitted intentionally or ...
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