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<div class="moz-cite-prefix">On 5/7/2024 11:16 AM, Erik Carvalhal
Miller via Unicode wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CAJTfRPG0hqCSMLVnkC02tGQcM76UhoHruNpq=AxV_kauRoGw8Q@mail.gmail.com">“The
current conformant use of the undeprecated 96 tag characters is
specified in Unicode Technical Standard #51, ‘Unicode Emoji.’ See
ED-14a. emoji tag sequence (ETS) and Annex C, Valid Emoji Tag
Sequences in that specification.” No, the Standard itself (book
or collection) does not define what emoji tag sequences are or
which ones are valid; but that same Standard points to UTS #51 as
the definitive specification of ETSs for “conformant use” of tag
characters. </blockquote>
<p><font face="Candara">Contrary to your reading, the correct
interpretation of that passage is one that considers the tag
characters as quasi reserved for use with a specific external
protocol. The word "current" allows Unicode to later designate
other protocols, if desired.<br>
</font></p>
<p><font face="Candara">It very clearly does not contemplate any
other uses of tag characters, so no, their use with PUA
characters (or any other characters) is not conformant in the
same way as assigning a PUA code point a private character.</font></p>
<p><font face="Candara">In order to use the tag characters
conformantly, you must claim conformance to both TUS and UTS#51.<br>
</font></p>
<p><font face="Candara">A./<br>
</font></p>
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