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To maintain consistency across releases, you may prefer to use the untagged names in your production environment. The Change Release Tag program, UCHGRLS, lets you change the tagged command names in QSYS to the untagged command names in UNVPRD511.
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Detailed information on these methods of configuration can be found in Configuration Management.
Configuration File
The configuration file, UNVPRD511/UNVCONF(UCTL), provides the simplest method of specifying configuration options whose values will not change with each command invocation. These default values are used if the options are not read from one or more other sources.
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