HI we are in the process of Migrating to EJB3 from 1.1 in 1.1 descriptor we have following value in ejb-jar.xml <!DOCTYPE ejb-jar PUBLIC "-//Sun Microsystems, Inc.//DTD Enterprise JavaBeans 1.1//EN" "http://java.sun.com/j2ee/dtds/ejb-jar_1_1.dtd">now in EJB3 we have changed it to <ejb-jar xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" id="ejb-jar"> but JBOSS421 fails to deploy this schema. Any idea why this is happening? jboss throws following exception when we are trying to deploy ==> org.jboss.deployment.DeploymentException: ejb-jar.xml must either obey the right xml schema or define a valid DOCTYPE! at org.jboss.metadata.ApplicationMetaData.importEjbJarXml(ApplicationMet aData.java:339) Thanks Amar View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4105921#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...