SWI-Prolog -- unicode_nfkc

Documentation
- Reference manual
- Packages
  - SWI-Prolog Unicode library
    - library(unicode): Unicode string handling

Availability::- use_module(library(unicode)).(can be autoloaded)

[det]unicode_nfkc_casefold(+In, -Out)

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'.