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Translation equations

By Steven Vere

Communications of the ACM, Vol. 13 No. 2, Pages 83-89

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Input limited transduction expressions, or translation equations, are used to describe the syntax and left-context sensitive semantics for context-free languages. A formal procedure is given for deriving from a set of translation equations the specifications for a pushdown translator. The translator consists of Mealy form finite-state automata interacting by means of a pushdown stack. Within the framework described, string recognition and parsing may be treated as special cases of the translation problem.

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