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IDL (Interface Description Language) is a practical and useful tool for controlling the exchange of structured data between different components of a large system. IDL is a notation for describing collections of programs and the data structures through which they communicate. Using IDL, a designer gives abstract descriptions of data structures, together with representation specifications that specialize the abstract structures for particular programs. A tool, the IDL translator, generates readers and writers that map between concrete internal representations and abstract exchange representations.
David Alex Lamb (Wed,) studied this question.