Is the following an XSD issue? <xsd:attribute ref="jbsx:flag" use="required"/> That was the original issue that I had. You showed me that by namespace prefixing the flag attribute in the xml file, the issue does not exist. Can you please enlighten me? :) Why would the following work without any ns prefix in the xml: <xsd:element ref="jbsx:something" /> but not the attribute ref? I am just curious. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4074966#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...