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- A pk is *both* a physical and a logical object.
- Internet: request + transport = invariant
- NULLs: theoretical problems?
- Some really confusing things about parent-child relationship
- Weak entity types
- Last message date: Tue Aug 14 2007 - 23:01:01 CDT
- Archived on: Fri Aug 31 2007 - 20:41:07 CDT
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