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<h4>substitutionHeadName</h4>
<pre><a href="https://docs.oracle.com/en/java/javase/11/docs/api/java.base/java/lang/String.html?is-external=true" title="class or interface in java.lang" class="externalLink">String</a>&nbsp;substitutionHeadName</pre>
<div class="block">XML local name of a substitution group's head element.
 <p>
 If the value is "", then this element is not part of any
 substitution group.</div>
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