<a href="libxml2-SAX.html#reference">reference</a> in a HTML document is really implemented the same way as an entity <a href="libxml2-SAX.html#reference">reference</a> in an XML document.</p>
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        <div class="refsect2" lang="en"><h3><a name="HTML_PI_NODE">Macro </a>HTML_PI_NODE</h3><pre class="programlisting">#define <a href="#HTML_PI_NODE">HTML_PI_NODE</a>;
</pre><p>Macro. A processing instruction in a HTML document is really implemented the same way as a processing instruction