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GNU Libidn
**********

This manual is last updated 22 July 2021 for version 1.38 of GNU Libidn.

   Copyright © 2002–2021 Simon Josefsson.

     Permission is granted to copy, distribute and/or modify this
     document under the terms of the GNU Free Documentation License,
     Version 1.3 or any later version published by the Free Software
     Foundation; with no Invariant Sections, no Front-Cover Texts, and
     no Back-Cover Texts.  A copy of the license is included in the
     section entitled “GNU Free Documentation License”.

Introduction: How to use this manual.
Preparation: What you should do before using the library.
Utility Functions: Unicode transformation utility functions.
Stringprep Functions: Stringprep functions.
Punycode Functions: Punycode functions.
IDNA Functions: IDNA functions.
TLD Functions: TLD functions.
PR29 Functions: Detect strings non-idempotent under NFKC.
Examples: Demonstrate how to use the library.
Invoking idn: Command line interface to the library.
Emacs API: Emacs Lisp API for Libidn.
Java API: Notes on the Java port of Libidn.
C# API: Notes on the C# port of Libidn.
Acknowledgements: Whom to blame.
History: Rough outline of development history.

Appendices

PR29 discussion: Implementation aspects of the PR29 flaw.
On Label Separators: Discussions of a flaw in the IDNA spec.
Copying Information: License texts.

Indices

Function and Variable Index
Concept Index