**Context free** — may refer to: Concepts context free grammar deterministic context free grammar stochastic context free grammar weighted context free grammar context free language Software Context Free, a computer language for context free grammars … Wikipedia

**Context-free grammar generation algorithms** — are algorithms which generate a context free grammar or grammars from given symbol sequence or sequences.Applications for such algorithms include lossless data compression and data mining. A list of algorithms * Sequitur * Lempel Ziv Welch… … Wikipedia

**Context-free grammar** — In formal language theory, a context free grammar (CFG) is a formal grammar in which every production rule is of the form V → w where V is a single nonterminal symbol, and w is a string of terminals and/or nonterminals (w can be empty). The… … Wikipedia

**Context-free language** — In formal language theory, a context free language is a language generated by some context free grammar. The set of all context free languages is identical to the set of languages accepted by pushdown automata. Contents 1 Examples 2 Closure… … Wikipedia

**context-free** — adjective Date: 1964 of, relating to, or being a grammar or language based on rules that describe a change in a string without reference to elements outside of the string; also being such a rule … New Collegiate Dictionary

**context-free** — ˈ ̷ ̷ ˌ ̷ ̷ ¦ ̷ ̷ adjective : of, relating to, or being a grammar or language based on rules that describe a change in a string without reference to elements outside of the string ; also : being such a rule … Useful english dictionary

**Pumping lemma for context-free languages** — The pumping lemma for context free languages, also known as the Bar Hillel lemma, is a lemma that gives a property that all context free languages have. Its primary use is to prove a language is not context free.The pumping lemma for context free … Wikipedia

**Deterministic context-free language** — A deterministic context free language is a formal language which is defined by a deterministic context free grammar.[1] The set of deterministic context free languages is called DCFL[2] and is identical to the set of languages accepted by a… … Wikipedia

**Deterministic context-free grammar** — In formal grammar theory, the deterministic context free grammars (DCFGs) are a proper subset of the context free grammars. The deterministic context free grammars are those a deterministic pushdown automaton can recognize. A DCFG is the finite… … Wikipedia

**Stochastic context-free grammar** — A stochastic context free grammar (SCFG; also probabilistic context free grammar, PCFG) is a context free grammar in which each production is augmented with a probability. The probability of a derivation (parse) is then the product of the… … Wikipedia