Hi Paul,
Ok, next beta, you'll be able to do this, which is probably closer to what you were asking for in the first place
I set up this while logged in as JDORLON using Current Schema, then saved it, logged in as SCOTT and opened the same file.
The .MD file saves Current Schema as the username, and the SQL for the tables does not specify schema. Seems to work pretty well. Give it a try on the June 24th beta and let me know what you think.
-John