ed expression is one that is created but not immediately evaluated.
In a Jakarta Faces request processing life cycle, Jakarta Expression Language 
expressions are typically created in the tree building phase and evaluated in the 
rendering phrase.</p>

<p>Adding parameters to a <code>ValueExpression</code> further enhances the
power of deferred expressions.  The <a href="../../jakarta/el/LambdaExpression.html" title="class in jakarta.el"><code>LambdaExpression</code></a>
encapsulates such a construct.  A <c