Search results
Results from the WOW.Com Content Network
A terminal symbol, such as a word or a token, is a stand-alone structure in a language being defined. A nonterminal symbol represents a syntactic category, which defines one or more valid phrasal or sentence structure consisted of an n-element subset. Metasymbols provide syntactic information for denotational purposes in a given metasyntax.
The second is a link to the article that details that symbol, using its Unicode standard name or common alias. (Holding the mouse pointer on the hyperlink will pop up a summary of the symbol's function.); The third gives symbols listed elsewhere in the table that are similar to it in meaning or appearance, or that may be confused with it;
In computer science, extended Backus–Naur form (EBNF) is a family of metasyntax notations, any of which can be used to express a context-free grammar. EBNF is used to make a formal description of a formal language such as a computer programming language. They are extensions of the basic Backus–Naur form (BNF) metasyntax notation.
In logic, a metavariable (also metalinguistic variable [1] or syntactical variable) [2] is a symbol or symbol string which belongs to a metalanguage and stands for elements of some object language. For instance, in the sentence Let A and B be two sentences of a language ℒ
Hidden meanings of 10 professional symbols. WalletPop Staff. Updated July 14, 2016 at 9:07 PM.
Wirth syntax notation (WSN) is a metasyntax, that is, a formal way to describe formal languages. Originally proposed by Niklaus Wirth in 1977 as an alternative to Backus–Naur form (BNF). It has several advantages over BNF in that it contains an explicit iteration construct, and it avoids the use of an explicit symbol for the empty string ...
Each agency should therefore give the terms “sex”, “male”, “female”, “men”, “women”, “boys” and “girls” the meanings set forth in section 2 of this order when ...
Initialize the sequence so that it just contains one start symbol. Apply derivation rules to this start symbol and the ensuing sequences of symbols. [1] Applying rules in this manner can produce longer and longer sequences, so many BNF definitions allow for a special "delete" symbol to be included in the specification.