NOTES.md

Unicode Resources

• http://unicode.org/
• http://www.unicode.org/versions/Unicode9.0.0/ch03.pdf Normalization spec
• http://www.unicode.org/reports/tr15/ UNICODE NORMALIZATION FORMS
• http://www.unicode.org/reports/tr44/ UNICODE CHARACTER DATABASE
• Unicode Character Database

Unicode related Haskell packages

Casemapping and Casefolding

The text package already provides proper unicode casemapping and casefolding operations.

Additional features in text-icu

The Haskell package text-icu is a full featured implementation of unicode operations via bindings to the C++ icu libraries.

text-icu provides the following additional features:

• Normalization checks
• FCD normalization for collation
• String collation
• Iteration
• Regular expressions

Haskell Unicode Landscape

Unicode functionality in Haskell is fragmented across various packages. The most comprehensive functionality is provided by text-icu which is based on the icu C++ libraries. All related packages are listed here, they may or may not be up to date or useful.

• text-icu

Basic

• base Data.Char module
• charset Fast unicode character sets

Unicode Character Database

• unicode-properties Unicode 3.2.0 character properties
• hxt-charproperties Character properties and classes for XML and Unicode
• unicode-names Unicode 3.2.0 character names
• unicode Construct and transform unicode characters

Unicode Strings

ByteStrings (UTF8)

• utf8-string Support for reading and writing UTF8 Strings
• utf8-light Lightweight UTF8 handling
• hxt-unicode Unicode en-/decoding functions for utf8, iso-latin-* and other encodings

Text (UTF16)

• text An efficient packed Unicode text type
• text-normal Data types for Unicode-normalized text - depends on text-icu