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-rw-r--r--Doc/library/codecs.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Doc/library/codecs.rst b/Doc/library/codecs.rst
index 3169ae517b..b15d293e38 100644
--- a/Doc/library/codecs.rst
+++ b/Doc/library/codecs.rst
@@ -1417,6 +1417,9 @@ Applications) and :rfc:`3492` (Nameprep: A Stringprep Profile for
Internationalized Domain Names (IDN)). It builds upon the ``punycode`` encoding
and :mod:`stringprep`.
+If you need the IDNA 2008 standard from :rfc:`5891` and :rfc:`5895`, use the
+third-party `idna module <https://pypi.org/project/idna/>_`.
+
These RFCs together define a protocol to support non-ASCII characters in domain
names. A domain name containing non-ASCII characters (such as
``www.Alliancefrançaise.nu``) is converted into an ASCII-compatible encoding