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Revise IRI advice after i18n input #155

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Feb 10, 2025
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Revise IRI advice after i18n input #155

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16 changes: 10 additions & 6 deletions spec/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -664,9 +664,8 @@ <h3>IRIs</h3>
</p>

<ul>
<li>Use lowercase characters in scheme names and domain names.</li>
<li>Only use percent-encoding of characters where
necessary for IRI syntax.</li>
<li>Use lowercase characters in scheme names.</li>
<li>Only use percent-encoding of characters where required by the IRI syntax.</li>
<li>Omit the HTTP or HTTPS default port; <code>http://example/</code>
is preferred over <code>http://example:80/</code>.</li>
<li>Use uppercase hexadecimal letters within percent-encoding
Expand All @@ -676,9 +675,14 @@ <h3>IRIs</h3>
<code>http://example/</code> is preferred over
having no path <code>http://example</code>.</li>
<li>Normalize IRIs to remove "<code>/./</code>" and "<code>/../</code>" in the path
component of an IRI.</li>
<li>Avoid using punycode-encoding of Internationalized Domain Names
in IRIs [[RFC5890]].</li>
component of an IRI.</li>
<li>Use lowercase characters in domain names.
Note that, while ASCII characters in domain names are case-insensitive,
non-ASCII characters in domain names are case-sensitive [[RFC5890]].
Domains are generally only registered with lowercase letters [[RFC5892]].</li>
<li>Avoid using the
<a href="https://datatracker.ietf.org/doc/html/rfc5890#section-2.3.2.1">A-label</a>
(ASCII, punycode-encoded name]) for Internationalized Domain Names [[RFC5890]] in IRIs.</li>
<li>Use IRIs in Unicode [=Normalization Form C=] [[I18N-Glossary]].</li>
</ul>
</div>
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