Hi, I've just generated a new Seam web project in Eclipse with the latest JBoss Tools installed. In the layout of the project folders there are two versions of perisistence.xml as well as datasource (MyProject-ds.xml) files. 1. persistence.xmllocated in src/model/META-INF and src/META-INF When the application is deployed only the first one is put into the war, specifically into /WEB-INF/classes/META-INF folder. What is the point in second src/META-INF/persistence.xml? 2. MyProject-ds.xml located in resources/ and src/model/META-INF The first one goes sibling with .war file (or directory) to the root dir of the deploy dir, the second goes into /WEB-INF/classes/META-INF, and apparently is ignored by JBossAS. What is the point of src/model/META-INF/MyProject-ds.xml? Is it somehow related to the differences between development/production/testing versions? Thanks, View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4107450#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...