This library implements the simple, non locale-sensitive unicode collation algorithm described in RFC 5051. Proper unicode collation can be done using text-icu, but that is a big dependency that depends on a large C library. rfc5051 might be better for some purposes.
Here is a list of lines sorted by the Prelude's sort function:
Abe Oeb abe abé oeb Ábe Äbe Ôeb ábe äbe ôeb
Here is the same list sorted by sortBy compareUnicode:
Abe abe abé Ábe ábe Äbe äbe Oeb oeb Ôeb ôeb
The library's data module, Data.RFC5051.UnicodeData, is generated
from the data file UnicodeData.txt. To regenerate it, use the
Makefile or:
runghc MkUnicodeData.hs > src/Data/RFC5051/UnicodeData.hs