1. Inplace swizzling, copy swizzling
2. Concurrency control? Concurrency issue if not dealt well?
3. ODMG 3.0 elaborate Object name, object structure, literal, lifetime
4. ODMG 3.0, inheritance
5. Questions that raise for orthogonal persistance. 
6. Principlals of orthogonal persistance? Pros and cons?
7. Starburst XNF
8. Explain Concurrency Control. What happens if concurrency is not dealt well