JBoss seam reference section 1.2.1.8 contains the following instructions The persistence.xml file tells the EJB persistence provider where to find the datasource, and contains some vendor-specific settings. In this case, enables automatic schema export at startup time. <persistence-unit name="userDatabase"> org.hibernate.ejb.HibernatePersistence <jta-data-source>java:/DefaultDS</jta-data-source> </persistence-unit> How to create this DSN ? Is this data source similar to Websphere datasource ? Is there a way where we can create this through Eclipse IDE and map it to corresponding database ? please clarify. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=3957770#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...