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This paper discusses the problems and benefits of using the Prolog language to write application programs. Much attention is currently focused on expert-systems shells, which play a role in artificial intelligence (AI) systems similar to that of application generators in more conventional applications. The Prolog programming language embodies many of the features found in these shells, while providing a relatively general and complete programming language. MVS performance tuning is used as an application that typifies a broad class of applications suitable for implementation in this language. Some of the difficulties that had to be overcome to use the language are presented, with their solutions.
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