I use standard file names and still cannot get Context DB Designer to import an Elevate DB.
However, if you design a DB in Context DB Designer, it does export an EDB database with all the CREATE TABLE statements and FOREIGN KEY constraints. It is only the import feature that does not work with Elevate DB.
It is a great system allowing you to produce E-R diagrams and other documentation - and following on from your idea, if you define a DOMAIN in Context DB Designer, then you can see which fields have a common attributes.