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7.5.2 Charset selection

As it is set up now, ptx assumes that the input file is coded using 8-bit characters, and it may not work well in multibyte locales. In a single-byte locale, the default regular expression for a keyword allows foreign or diacriticized letters. Keyword sorting, however, is still crude; it obeys the underlying character set ordering quite blindly.

The output of ptx assumes the locale’s character encoding. For example, with ptx’s -T option, if the locale uses the Latin-1 encoding you may need a LaTeX directive like ‘\usepackage[latin1]{inputenc}’ to render non-ASCII characters correctly.

-f
--ignore-case

Fold lower case letters to upper case for sorting.