jbossas/jboss-as — pull request #2546 by scottmarlow (2012-06-21 15:49:09+00:00)
Title: AS7-4940 top-level jboss-jpa.xml will allow shallow (no sibling and one ...

...level of bean creation/call stack crawling) or deep (sibling and recursive creation/bean call stack crawling) extended persistence context inheritance. DEEP has been the JBoss default for AS5/AS6, SHALLOW is what some other vendors have implemented (see discusion thread here http://java.net/projects/jpa-spec/lists/jsr338-experts/archive/2012-06/message/1).