Looking up an ejb from another ejb

[Trujillo, Kris]

Does anyone know if it is possible for an EJB in one ear file to lookup an
EJB in another ear file WITHOUT having to set the parent attribute on the
application in the server.xml?  What if EJBs in both ear files needed to
perform bi-directional calls on each other? Who would be the "parent" in
that case??