There is an MBean/POJO that can be deployed to add schemas at runtime. The singleton is just a mechanism to setup "known ones" automatically. i.e. factory settings. There is a post about it somewhere in the JBossXB forum. If search worked I could find it for you. :-) e.g. | <bean name="Schemas" class="org.jboss.xb.binding.sunday.unmarshalling.SchemaResolverConfig"> | | <!-- The initializer classes --> | <property name="SchemaInitializers"> | urn:somenamespace=some.class.name | </property> | | <!-- The locations these are added to JBossEntityResolver --> | <property name="SchemaLocations"> | urn:somenamespace=schema/some.xsd | </property> | | <!-- Only for performance if your schema is annotated, but only with coments --> | <property name="ParseAnnotations"> | urn:somenamespace=false | </property> | </bean> | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4002874#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...