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<div class="moz-cite-prefix">On 8/22/2022 3:45 PM, Richard
Wordingham via Unicode wrote:<br>
</div>
<blockquote type="cite" cite="mid:20220822234538.05c26af6@JRWUBU2">
<pre class="moz-quote-pre" wrap="">But "U+0023 NUMBER SIGN ("#") is used to indicate comments: all
characters from the number sign to the end of the line are considered
part of the comment, and are disregarded when parsing data."
and "The comments are purely informational, and may change format or be
omitted in the future. They should not be parsed for
content."!(Revision 28 Section 4.2.4).
I think something needs to be added at the start of Section 4.2.4 to say
that a line starting U+0023, U+0020, U+0040 is exceptionally <b class="moz-txt-star"><span class="moz-txt-tag">*</span>not<span class="moz-txt-tag">*</span></b> a
comment line.</pre>
</blockquote>
<p><font face="Candara">That the @missing directives are contained
in comment lines is a long-standing issue.</font></p>
<p><font face="Candara">Indeed, section 4.2.10 starts (emphasis
added):<br>
</font></p>
<blockquote>
<h4>4.2.10 <a name="Missing_Conventions"
href="https://www.unicode.org/reports/tr44/tr44-29.html#Missing_Conventions">@missing
Conventions</a></h4>
<p>Specially-formatted <font color="#ff8040"><i><b>comment lines</b></i></font>
with the keyword "@missing" are
used to define default property values for ranges of code points
not explicitly listed
in a data file. These lines follow regular conventions that make
them
machine-readable.</p>
<p>An @missing line <font color="#ff8040"><i><b>starts with the
comment character "#", followed by
a space, then the "@missing" keyword</b></i></font>,
followed by a colon, another space, a code
point range, and a semicolon. Then the
line typically continues with a semicolon-delimited list of one
or more
default property values. For example:</p>
<blockquote>
<pre># @missing: 0000..10FFFF; Unknown
....
</pre>
</blockquote>
</blockquote>
<p>I see no reason to add anything to section 4.2.4 other than,
perhaps, a note that points to section 4.2.10 from the bullet item
you cite.<br>
</p>
<p>A./<br>
</p>
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<blockquote> </blockquote>
<p></p>
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