@Implements annotation

[cbeams]

I'd like to get a little clarity on the @Implements annotation.  Why  
does it need to exist?

For example:
    @PersistenceCapable
    @Implements(org.jpox.samples.MyInterface.class)
    public class MyClass implement MyInterface
    {
        ...
    }

This just seems redundant at first glance.  I'm sure there is a valid  
reason, but the spec doesn't say much (at least it doesn't in the  
19.18 section).  Please enlighten me, thanks.

- Chris

Chris Beams