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Add support for subscripts and superscripts #585

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Add support for subscripts and superscripts #585

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29 changes: 28 additions & 1 deletion imsc1/spec/ttml-ww-profiles.html
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Original file line number Diff line number Diff line change
Expand Up @@ -1100,6 +1100,17 @@ <h2>Supported Features and Extensions</h2>
<td><span class="prohibited label">prohibited</span></td>
</tr>

<tr>
<td>
<a href="https://www.w3.org/TR/2018/REC-ttml2-20181108/#feature-fontVariant"><code>#fontVariant</code></a>
</td>

<td><span class="permitted label">permitted</span><br>
<small>Section <a href="#font-variant-constraints"></a> specifies additional constraints.</small></td>

<td><span class="prohibited label">prohibited</span></td>
</tr>

<tr>
<td>
<a href="https://www.w3.org/TR/2018/REC-ttml2-20181108/#feature-fontWeight"><code>#fontWeight</code></a>
Expand Down Expand Up @@ -3518,7 +3529,19 @@ <h4>Slanted Japanese-language text</h4>
(b) Japanese-language slanted vertical text consists of characters slanted in the vertical direction (and not
in the horizontal direction), it is recommended that <code>tts:shear</code> be specified to slant Japanese-language text
– instead of specifying <code>tts:fontStyle="italic"</code> or <code>tts:fontStyle="oblique"</code>.</p>
</section>
</section>

<section id="font-variant-constraints">
<h4><code>#fontVariant</code></h4>

<p>The computed value of the <code>tts:fontVariant</code> attribute SHALL be one of the
following:</p>
<ul class="short-list">
<li><code>normal</code>;</li>
<li><code>sub</code>; or</li>
<li><code>super</code>.</li>
</ul>
</section>
</section>
</section>

Expand Down Expand Up @@ -5083,6 +5106,10 @@ <h4>Added Features</h4>
<tr>
<td style="text-align:center"><em>Relative to the TT Feature namespace</em></td>
</tr>
<tr>
<tr>
<td><code>#fontVariant</code></td>
</tr>
</tbody>
</table>
</section>
Expand Down