nMapper</code></a> provides
a flexible mechanism to add functions to Jakarta Expression Language, 
<a href="../../javax/el/VariableMapper.html" title="class in javax.el"><code>VariableMapper</code></a> provides a flexible mechanism to support the notion of 
<strong>Jakarta Expression Language variables</strong>.
</p>
 
<p>
A Jakarta Expression Language variable does not directly refer to a model object that can then
be resolved by an <code>ELResolver</code>. Instead, it refers to a Jakarta Expression Langua