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UML and Data Modeling: A Reconciliation by David Hay

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Unfortunately, many modelers dont have the inclination or the ability to do so. The final product suffers.[(]

On the face of it, conversion to UML should be very easy. The UML entity/relationship Relationship Name seems to take the same form as UML Association Name. In Figure 2-3, translating the cardinality symbols to UML, we can read the relationship:

·         Each Order may be composed of one or more Line Items.

Figure 2-3: UML Associations

The problem, however, is that the relationship name can only be specified in one direction. In UML, you can have one or the other, but not both. This constraint makes that approach ...

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