unicode:unicode_nfkc_casefold/2

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Predicate unicode_nfkc_casefold/2

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utf8proc
- unicode.pl -- Unicode string handling

unicode_nfkc_casefold(+In, -Out) is det: Equivalent to unicode_nfkc/2 followed by unicode_casefold/2 done in a single pass. This is the normalisation form recommended by UAX#31 for caseless identifier matching. For example German 'Strasse' written with U+00DF (LATIN SMALL LETTER SHARP S) maps to 'strasse', and U+FB03 (LATIN SMALL LIGATURE FFI) maps to 'ffi'.