Kavisha,
None of us will write better than the members of the expert group, try to read one of the first sections of the
EJB 3.1 specification which describes the new features, including annotations, introduced in the newer version of the specification.
Any doubt about a specific annotation or feature, feel free to ask by PM or even in here!
Feel free to ask me anything!
www.BlackBeltFactory.com/ui#!/ref=jmotta, SCJP 6, OCWCD JEE5, OCE EJB JEE6