The Java Persistence API (JPA) is the standard for using persistence in Java projects. Java EE 6 applications use the Java Persistence 2.0 specification, documented here: http://www.jcp.org/en/jsr/detail?id=317
Hibernate EntityManager implements the programming interfaces and life-cycle rules defined by the specification. It provides JBoss EAP 6 with a complete Java Persistence solution.
JBoss EAP 6 is 100% compliant with the Java Persistence 2.0 specification. Hibernate also provides additional features to the specification.