Java EE (Java Enterprise Edition) General Discussion

I found that jaxb-libs.jar is different between jwsdp1.2 and jswdp1.1? Why?
And When I use jwsdp1.2, my compiler tells me that it couldn't find class com.sun.msv.datatype.xsd.IntegerType. It's ok when I replace jaxb-libs.jar by the same jar in jwsdp1.1.

In Addition, the package structure is different when I use different version xjc.bat .
In 1.2 , the package structure is (I tested it)
mypackage
mypackage.impl
mypackage.impl.runtime
In 1.1, the package structure is (I didn't try, I concluded it from demo)
mypackage
mypackage.impl