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<div class="moz-cite-prefix">On 2/12/2019 7:12 PM, John Levine
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:alpine.OSX.2.21.1902122211360.10209@ary.qy">
<blockquote type="cite">In a recent discussion someone put it that
labels should be valid IDN U labels once they are "in the
system". Now, when you make a DNS lookup the label you submit is
"in the system". When it's on the side of a bus, to use the
other extreme, it's not. Now, where do you draw the line for
where "the system" starts? I don't think you can include all
HTML documents or HTML mail message or any other place a URL can
and does exist today.
<br>
</blockquote>
<br>
Who knows? There are standards for URLs, but if you look at three
browsers you'll probably find at least four misinterpretations of
them.
</blockquote>
<p><br>
</p>
<p>What I am arguing is that you cannot retroactively apply
standards that haven't been followed; particularly for HTML you
have a whole internet's worth of legacy data that any system must
be able to handle and continue to do so for the indefinite future.<br>
</p>
<p>A./<br>
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