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2. Context-free grammar - Wikipedia

   en.wikipedia.org/wiki/Context-free_grammar

   Context-free grammar. Simplified excerpt of the formal grammar [1] for the C programming language (left), and a derivation of a piece of C code (right) from the nonterminal symbol . Nonterminal symbols are blue and terminal symbols are red. In formal language theory, a context-free grammar ( CFG) is a formal grammar whose production rules can ...

3. Comparison of parser generators - Wikipedia

   en.wikipedia.org/.../Comparison_of_parser_generators

   To do so technically would require a more sophisticated grammar, like a Chomsky Type 1 grammar, also termed a context-sensitive grammar. However, parser generators for context-free grammars often support the ability for user-written code to introduce limited amounts of context-sensitivity. (For example, upon encountering a variable declaration ...

4. Phrase structure rules - Wikipedia

   en.wikipedia.org/wiki/Phrase_structure_rules

   Phrase structure rules are a type of rewrite rule used to describe a given language's syntax and are closely associated with the early stages of transformational grammar, proposed by Noam Chomsky in 1957. [1] They are used to break down a natural language sentence into its constituent parts, also known as syntactic categories, including both ...

5. Backus–Naur form - Wikipedia

   en.wikipedia.org/wiki/Backus–Naur_form

   Backus–Naur form. In computer science, Backus–Naur form ( / ˌbækəs ˈnaʊər /) (BNF or Backus normal form) is a notation used to describe the syntax of programming languages or other formal languages. It was developed by John Backus and Peter Naur. BNF can be described as a metasyntax notation for context-free grammars.

6. SCIgen - Wikipedia

   en.wikipedia.org/wiki/SCIgen

   SCIgen is a paper generator that uses context-free grammar to randomly generate nonsense in the form of computer science research papers. Its original data source was a collection of computer science papers downloaded from CiteSeer. All elements of the papers are formed, including graphs, diagrams, and citations.

7. Probabilistic context-free grammar - Wikipedia

   en.wikipedia.org/wiki/Probabilistic_context-free...

   Probabilistic context-free grammar. Grammar theory to model symbol strings originated from work in computational linguistics aiming to understand the structure of natural languages. [1] [2] [3] Probabilistic context free grammars ( PCFGs) have been applied in probabilistic modeling of RNA structures almost 40 years after they were introduced in ...