As far as I remember there is some beast called "Oracle
transparent gateway for IMAGE/SQL" that does some kind of
bridge between the two databases. One can make IMAGE/SQL
data "visible" in the Oracle database or vice versa or
maybe even both. Sorry, but I do not have details at hand.
Lars (databases'r'not'us) Appel/iX (not Aster/iX or Obel/iX)