Castor is an open source data binding framework for Java. It's the shortest path between Java objects, XML and relational tables. Castor provides Java-to-XML binding, Java-to-relational persistence, and more.

The project targets the Reference Implementation of JSR235 - Service Data Objects. The current source code while mature enough to be included in shipped BEA products is not yet finished as a JSR reference implementation. Links: - Current SDO specification - currently v2.1: http://osoa.org/display/Main/Service+Data+Objects+Specifications - JSR 235 http://www.jcp.org/en/jsr/detail?id=235