>Out of the box, it seems that other default values are not prefetched. This requires putting default value generation elsewhere and having to maintain consistency between code in that location and in the DBC.

>Is this accurate?

Yes

>Has anyone worked on a mechanism to retrieve other default values?

Since I create all of my views with code I set the default values in the same procedure file.

>... given the assumption that only 1 table in the view is updateable.

This is how I create my updateable views but I think your assumption may be to restrictive to implement in a framework.