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IBM Journal of Research and Development  
Volume 25, Number 5, Page 549 (1981)
25th Anniversary Issue
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Formal Semantics of Programming Languages: VDL

by P. Lucas
The history of ideas that led to the first formalization of the syntax and semantics of PL/I is sketched. The definition method and notation are known as the Vienna Definition Language (VDL). The paper examines the relationship between VDL and both denotational semantics and the axiomatic approach to programming language definition.
Related Subjects: Compilers and interpreters; Programming, programs, and programming languages; Semantics