ol and ul accept the type attribute. You can use it to set a different numbering type in HTML.
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<ol type="a">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
</ol>
<ol type="A">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
</ol>
<ol type="i">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
</ol>
<ol type="I">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
</ol>
<ul type="1">
<li>Element 1</li>
<li>Element 2</li>
<li>Element 3</li>
</ul>