Metavariable

In logic, a metavariable (also metalinguistic variable or syntactical variable) is a symbol or symbol string which belongs to a metalanguage and stands for elements of some object language. For instance, in the sentence

the symbols A and B are part of the metalanguage in which the statement about the object language ℒ is formulated.

单词	Syntactic variable
释义	Syntactic variable 英语百科 Metavariable In logic, a metavariable (also metalinguistic variable or syntactical variable) is a symbol or symbol string which belongs to a metalanguage and stands for elements of some object language. For instance, in the sentence the symbols A and B are part of the metalanguage in which the statement about the object language ℒ is formulated.
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Syntactic variable

Metavariable