Assertion: environment variable | /r/HasProperty | defined via the config.sys directive
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text: While the content of environment variables remains unchanged upon storage, their names (without the " % ") are always converted to uppercase, with the exception of pre-environment variables defined via the CONFIG.SYS directive SET under DR DOS 6.0 and higher (and only with SWITCHES=/L (for "allow lowercase names") under DR-DOS 7.02 and higher).