What do you mean like adding the namespace to the Java XmlElement annotation on the setSipServlets method in my SipMetaData class ? (I http://code.google.com/p/mobicents/source/browse/trunk/servers/sip-servle... ) I tried that too but it didn't work neither. I even tried to create my own ServletsMetatData and ServletMetatData classes and add the namespace in the same way to the different setters present in the ServletMetatData class but it didn't work neither. Shall I create an issue somewhere ? Alternatively is this the correct link to checkout the JBossXB project http://anonsvn.jboss.org/repos/common/jbossxb ? I can try to write a sandboxed testcase to try to replicate the problem on a smaller scale by creating 2 simple xsd with one importing the other and try to validate a simple xml file. Is there any guidelines or test I could duplicate to create the above-mentionned testcase ? Thanks in advance and for looking into it and try to help me out, that is highly appreciated BR Jean View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4200706#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...