Validating user entry in XML Webforms

Hi everybody!

I'm trying to validate user entries in an XML Webform.

I'm trying to validate an email address. Following http://help.sap.com/saphelp_nw04/helpdata/en/03/c10f41dd57f623e10000000a155106/content.htm I've referenced my input controls to schema elements.

I've selected String as data type and in <b>pattern</b> i put

\w([-.]\w)*@\w([-.]\w)*\.\w([-.]\w)([,;]\s\w([-.]\w)@\w([-.]\w)\.\w([-.]\w))

When i Save the form with a blank or invalid value nothing happens. Am I loosing something?

Thanks in advance,

Fede