Rule #3

• Non-Key Attributes Depend on only the Key
• In the Car Table
• Color is a good Attribute
• It could change but it is an Attribute of the Car
• Owner is a bad Attribute
• It may never change but it is a completely different entity

Red

is

Sleeper

has

10 Tires

has

White

Trailer is

Trailer has

8 Tires