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				<tr><td valign="top" class="name">speak-header</td><td valign="top" nowrap class="compatibility">NN<span class="emphasis"> s.o.</span> IE<span class="emphasis"> s.o.</span> CSS<span class="emphasis"> 2</span></td>
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					<td valign="top" nowrap class="usage"><p class="literal"></p>
					</td><td valign="top" nowrap class="requirements">H&eacute;rit&eacute;: oui</td>
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					<td valign="top" colspan="2" class="description"><p>Pour les navigateurs &agrave;synth&egrave;se vocale, cet attribut pr&eacute;cise si le navigateur doit lire le nom de l'en-t&ecirc;te de chaque cellule de tableau avant de lire la valeur de la cellule, ou s'il doit le lire une seule fois pour toutes les cellules adjacentes partageant le m&ecirc;me en-t&ecirc;te (lorsqu'il lit une colonne de haut en bas, par exemple).
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					<td valign="top" colspan="2" class="CLEARSEPARATION">&#160;</td>
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					<td valign="top" colspan="2" class="csssyntax"><span class="title">Syntaxe CSS</span></td>
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					<td><span class="programlisting"><pre>speak-header: <span class="replaceable">headerFrequency</span></pre>
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					<td valign="top" colspan="2" class="value"><span class="title">Valeur</span></td>
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					<td><p>Deux constantes sont possibles: <span class="literal">once</span> | <span class="literal">always</span>.
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					<td valign="top" colspan="2" class="CLEARSEPARATION">&#160;</td>
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					<td valign="top" colspan="2" class="initvalue"><span class="title">Valeur initiale</span></td>
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					<td><p><span class="literal">once</span></p>
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					<td valign="top" colspan="2" class="CLEARSEPARATION">&#160;</td>
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					<td valign="top" colspan="2" class="appliesto"><span class="title">S'applique &agrave;</span></td>
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					<td><p>El&eacute;ments <span class="literal">th</span>.</p>
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