- Allocated arbitrarily by DBD under ER/EER
- Goodness at
- Internal/storage level (base relations only)
- Reducing nulls - obvious storage benefits /frequent
- Reducing redundancy - for efficient storage/anomalies
- Conceptual level
- Semantics of the attributes /single entity:relation
- No spurious tuple generation /no match Attr,-PK/FK
In Focus
3.1.02. Value in design