ejb.dfPackage & ejb.dfPackage.wmf

[SAURUGGER,PETER (A-PaloAlto,ex2)]

Anybody knows the role these files play (they are in the ATM example,
com/acme/atm/ejb in atm-ejb) - what are they for, where do I find info (e.g.
about format), and how is the *.wmf file created?

Cheers

        --peter