1. OO models with relational databases
How to use UML for modeling and designing a relational data base.

2. Keep in mind!
No standard for UML database modeling exists! (->No tools supports rapid design from model as far as I know)
The UML database model is developed from the OO applications UML data model
or the other way around
The UML database model are not the same model as the UML data model.
Different dynamics (That’s why NF process comes in)

3. Keep in mind!
But work to make them so similar as possible….decreasing the OO-RDB impedance mismatch.
Two different techniques are in use and they has different demands to design
Conceptually there MUST be no difference
Otherwise you may be in d…

4. Stereo types and keys
Use a key stereotype on class attributes indicating Relational key rolle
In Visio 2003 use prefix or suffix in attributes properties
Like <<PK>> Primary Key and <<FK>> Foreign Key.

5. Visio Example

6. Associations and Relationships
Same association type: 1..1, 1..N, M..N..
Cardinality use standard rules
Type of association
Aggregation same as optional participation
Composition same as mandatory participation
Remember Subject-Target relationship (UML Diamond on target) .
Inheritance is Generalization or Specialization be sure to set direction (Super class determines id as <<PK> sub class gets a <<FK>> from Super class)