File: coreutils.info,  Node: Charset selection in ptx,  Next: Input processing in ptx,  Prev: General options in ptx,  Up: ptx invocation

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.