If I want to implement a one line text field with JSP forms I write:

<input type="text" id="${property_name}" name="${property_name}" value="${ssDefinitionEntry.customAttributes[property_name].value}"/>

But what have I to do when I need a text area field?
... I tried it with action="textarea" but this don't work... and I also tried other things... but nothing works...

Any tip or idea for me? Or a link to a documentation about this? The w4-form example (developer documentation) has no text area field.