ime the component for this tag is created</li>

            <li>The "target" and "value" tag attributes are
            ValueExpression
            instances and are stored unevaluated as instance variables of the
            listener.</li>

            <li>When the listener executes, perform the following:
            <ul>
            Call getValue() on the "value" ValueExpression.
            </ul>
            <ul>
            If value of the "value" expression is null, call setValue() on
            the 