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2. Context-free language - Wikipedia

   en.wikipedia.org/wiki/Context-free_language

   The set of all context-free languages is identical to the set of languages accepted by pushdown automata, which makes these languages amenable to parsing.Further, for a given CFG, there is a direct way to produce a pushdown automaton for the grammar (and thereby the corresponding language), though going the other way (producing a grammar given an automaton) is not as direct.

3. Context-free grammar - Wikipedia

   en.wikipedia.org/wiki/Context-free_grammar

   An extended context-free grammar (or regular right part grammar) is one in which the right-hand side of the production rules is allowed to be a regular expression over the grammar's terminals and nonterminals. Extended context-free grammars describe exactly the context-free languages.

4. Charm (programming language) - Wikipedia

   en.wikipedia.org/wiki/Charm_(programming_language)

   The Charm language is defined by a context-free grammar amenable to being processed by recursive descent parser as described in seminal books on compiler design. [1] [2] A set of Charm tools including a compiler, assembler and linker was made available for Acorn's RISC OS platform. [3]

5. Chomsky normal form - Wikipedia

   en.wikipedia.org/wiki/Chomsky_normal_form

   To convert a grammar to Chomsky normal form, a sequence of simple transformations is applied in a certain order; this is described in most textbooks on automata theory. [4]: 87–94 [5] [6] [7] The presentation here follows Hopcroft, Ullman (1979), but is adapted to use the transformation names from Lange, Leiß (2009).

6. Indexed grammar - Wikipedia

   en.wikipedia.org/wiki/Indexed_grammar

   The language { www : w ∈ {a,b} *} is generable by an indexed grammar, but not by a linear indexed grammar, while both { ww : w ∈ {a,b} *} and { a n b n c n : n ≥ 1 } are generable by a linear indexed grammar. If both the original and the modified production rules are admitted, the language class remains the indexed languages. [16]

7. Wikipedia:Writing better articles - Wikipedia

   en.wikipedia.org/wiki/Wikipedia:Writing_better...

   If its subject is amenable to definition, then the first sentence should give a concise definition: where possible, one that puts the article in context for the nonspecialist. [7] Similarly, if the subject is a term of art, provide the context as early as possible. [8] If the article is about a fictional character or place, make sure to say so. [9]

8. Applicative universal grammar - Wikipedia

   en.wikipedia.org/wiki/Applicative_universal_grammar

   Applicative universal grammar, or AUG, is a universal semantic metalanguage intended for studying the semantic processes in particular languages. [1] This is a linguistic theory that views the formation of phrase structure by analogy to function application in an applicative programming language .

9. Constraint grammar - Wikipedia

   en.wikipedia.org/wiki/Constraint_Grammar

   Constraint grammar (CG) is a methodological paradigm for natural language processing (NLP). Linguist-written, context -dependent rules are compiled into a grammar that assigns grammatical tags ("readings") to words or other tokens in running text.