You can automatically generate a logical Entity Relation diagram from a UML Class diagram.

Only classes designated as persistent are mapped to entities in an ER diagram.

Class attributes are mapped over to attributes and data elements of the corresponding entity, if they do not already exist.

The entity attribute is given the same name as the class attribute and is associated with the newly created data element. The data element is given the name of the class attribute prefixed with OO-DE_.

The new data elements type is determined through the type translations specific for each language:

Associations between classes are mapped to non-specific relationships between entities.

Inheritance structures are mapped to super-sub structures in an ER diagram.