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Clarify escapability requirements for reading systems #2304

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May 24, 2022
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Clarify escapability requirements for reading systems #2304

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e37c83d
Clarify escapability requirements for reading systems
mattgarrish May 20, 2022
653f9a4
Update epub33/rs/index.html
mattgarrish May 20, 2022
3953912
simplify the wording of the escaping requirement
mattgarrish May 22, 2022
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15 changes: 9 additions & 6 deletions epub33/rs/index.html
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Original file line number Diff line number Diff line change
Expand Up @@ -1152,8 +1152,8 @@ <h3>Cascading Style Sheets (CSS)</h3>
</li>
<li>
<p id="confreq-css-rs-fonts" data-tests="#cnt-css-fonts">MUST support [[truetype]],
[[opentype]], [[woff]], and [[woff2]] font resources referenced from
<a data-cite="css-fonts-4#font-face-rule"><code>@font-face</code> rules</a>
[[opentype]], [[woff]], and [[woff2]] font resources referenced from <a
data-cite="css-fonts-4#font-face-rule"><code>@font-face</code> rules</a>
[[css-fonts-4]].</p>
</li>
<li>
Expand Down Expand Up @@ -2017,10 +2017,13 @@ <h5>Skippability</h5>
<h5>Escapability</h5>

<p>
<span id="mol-escaping-support">Reading systems SHOULD allow escaping of nested structures. </span>
<span id="mol-escaping-structure">Reading systems MUST determine the start of nested structures
by the value of the [^/epub:type^] attribute and SHOULD offer users the option to skip
playback of that structure and resume with whatever content comes after it.</span>
<span id="mol-escaping-support">While playing media overlays, reading systems SHOULD offer users
the option to leave ("escape") <a data-cite="epub-33#sec-escapability">escapable
structures</a> [[epub-33]], which are determined by the presence of an [^/epub:type^]
attribute [[epub-33]] with a value from the escapable structures list.</span>
<span id="mol-escaping-structure">If a user opts to escape from an escapable structure, then the
reading system MUST continue playback with the next sequential element after the
structure.</span>
</p>
</section>
</section>
Expand Down