here is a copy of a persistence.xml file i've used. also, i set up the oracle datasource in oracle-ds.xml and put the jdbc jar file (ojdbc14.jar) in the .../server/default/lib dir. <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"> | | <persistence-unit name="p_unit" transaction-type="JTA"> | | <provider>org.hibernate.ejb.HibernatePersistence</provider> | | <jta-data-source>java:/OracleDS</jta-data-source> | | <class>entity.One</class> | <class>entity.Two</class> | <class>entity.Three</class> | | | <properties> | <property name="hibernate.hbm2ddl.auto" value="create-drop"/> | </properties> | | </persistence-unit> | | </persistence> View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4055669#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...