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    <div class="moz-cite-prefix">On 2/17/2022 8:44 PM, Saeed Hubaishan
      via Unicode wrote:<br>
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    <blockquote type="cite"
cite="mid:BY5PR02MB6962BE312A1B0952D273BF5FCC379@BY5PR02MB6962.namprd02.prod.outlook.com">
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        Hi,<br>
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        "The Decomposition Type Mapping"  of these ligature marks are
        worng:</div>
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              <td><code><a moz-do-not-send="true">FC5E</a></code></td>
              <td class="c" dir="rtl"> ‎ﱞ‎ </td>
              <td colspan="2"><span class="name">Arabic Ligature Shadda
                  With Dammatan Isolated Form</span></td>
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              <td> </td>
              <td class="char"> </td>
              <td class="c">≈</td>
              <td><isolated> <code>0020</code> <span class="inv">␣</span>
                <code>064C</code> ◌ٌ <code>
                  0651</code> ◌ّ</td>
            </tr>
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              <td><code><a moz-do-not-send="true">FC5F</a></code></td>
              <td class="c" dir="rtl"> ‎ﱟ‎ </td>
              <td colspan="2"><span class="name">Arabic Ligature Shadda
                  With Kasratan Isolated Form</span></td>
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              <td> </td>
              <td class="char"> </td>
              <td class="c">≈</td>
              <td><isolated> <code>0020</code> <span class="inv">␣</span>
                <code>064D</code> ◌ٍ <code>
                  0651</code> ◌ّ</td>
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        <br>
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        dir="ltr"></div>
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    ...<br>
    <blockquote type="cite"
cite="mid:BY5PR02MB6962BE312A1B0952D273BF5FCC379@BY5PR02MB6962.namprd02.prod.outlook.com">
      <div style="font-family: Calibri, Arial, Helvetica, sans-serif;
        font-size: 12pt; color: rgb(0, 0, 0); text-align: left;"
        dir="ltr">Arabic Shadda must be before the marks (<code><code>064C</code> ◌ٌ
          ,<code>064D</code> ◌ٍ , <code>064E</code> ◌َ</code> ,<code>
          064F</code> ◌ُ
        <code></code>,  <code>0650</code> ◌ِ) <br>
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    <p>Decompositions are immutable, constrained by normalization
      stability.</p>
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    <p>To see how such rendering should be handled, instead, please see
      Unicode Technical Report #53, Unicode Arabic Mark Rendering, which
      addresses the issue of the placement of shadda, along with many
      other issues of ordering and placement of various tashkil, ijam,
      and other marks:</p>
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    <p><a class="moz-txt-link-freetext" href="https://www.unicode.org/reports/tr53/">https://www.unicode.org/reports/tr53/</a></p>
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    <p>--Ken<br>
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