(VDL) IBM Vienna Labs. A language for formal, algebraic definition via operational semantics. Used to specify the semantics of PL/I. See also VDM.
["The Vienna Definition Language", P. Wegner, ACM Comp Surveys 4(1):5-63 (Mar 1972)].
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Nearby terms: video random-access memory « video terminal « videotex « Vienna Definition Language » Vienna Definition Method » Vienna Development Method » Vienna Development Method Specification Language
