 add an <a href="../../javax/el/ELContextListener.html" title="interface in javax.el"><code>ELContextListener</code></a>
 so that applications and frameworks can ensure their own context objects
 are attached to any newly created <code>ELContext</code>.</p>
 
<h3><a name="ExpressionObjects">Expression Objects</a></h3>

<p>At the core of the Expression Language is the notion of an <i>expression</i>
that gets parsed according to the grammar defined by the Expression Language.</p>

<p>There are two types of ex