On Wed, 2009-11-04 at 12:08 -0500, Chris Browne wrote:
> I'm
> a lot less certain about the merits of PK/FK constraints - it is a lot
> less obvious what forms of constraints will be able to be applied to
> particular applications.
Can you clarify, a little?
A temporal key just means "non-overlapping periods of time", and that
has a very clear meaning with respect to scheduling.
Regards,Jeff Davis
