Using OSDDM 3.3.
There does not appear to be anywhere that the naming convention of Arc Constraints and their corresponding triggers can be specified.
This is touched on in discussion https://forums.oracle.com/message/9828101#9828101 I think.
If that thread is about this, I would like to add my vote to an enhancement request.
If not, then this is my request for such an enhancement request.
Thank you & Regards