Why was the Java Persistence API developed as part of JSR-220 (EJB 3.0)?
The Java Persistence API originated as part of the work of the JSR 220 Expert Group to simplify EJB CMP entity beans. It soon became clear to the expert group, however, that a simplification of EJB CMP was not enough, and that what was needed was a POJO persistence framework in line with other O/R mapping technologies available in the industry. Once an Earlier Draft of the EJB 3.0 specification including the Java Persistence API was released, the JSR-220 Expert Group received many requests from the community that this work be made available beyond just the scope of EJB.
