Since the persistence_1_0.xsd schema specifically declares a targetNamespace, the descriptors will have to match it to validate. The persistence_1_0.xsd docs say the persistence namespace must be used as well: "persistence_1_0.xsd" wrote : | Persistence configuration files must indicate | the persistence schema by using the persistence namespace: | | http://java.sun.com/xml/ns/persistence | | and indicate the version of the schema by | using the version element as shown below: | | <persistence xmlns="http://java.sun.com/xml/ns/persistence" | xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" | xsi:schemaLocation="http://java.sun.com/xml/ns/persistence | http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" | version="1.0"> | ... | | View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4157221#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...