Test for null values in Expression Language

[Alessandro Polverini]

Hello,
I've another exciting question :)

I would like to render a component depending of the fact that the value
of a property is null or not.

I tried this way using the jstl EL syntax:

<h:outputText value="out" rendered="#{empty bean.property}"/>

But that does not seem to work.

What's the correct way of testing null values?

Thanks,
Alex