# Embeddable

An Embedded class is a class whose instances are stored as part of an owning entity; it shares the identity of the owning entity. Each field of the embedded class is mapped to the database table associated with the owning entity.

To override the mapping information for a specific subclass, use the `@AttributeOverride` annotation for that specific class.

An embeddable entity is identified by the `@Embeddable` annotation.

Use this procedure to add embeddable persistence to an existing entity:

1. Open the Java class in the Project Explorer.

2. Select the class in the JPA Structure view.

3. Click the mapping type hyperlink to open the Mapping Type Selection dialog.

4. Select Embeddable and then click OK.

   Mapping Type Selection Dialog (Embeddable)

5. Complete the remaining JPA Details view (for entities).

Related reference

- Adding persistence to a class

- Specifying additional tables

- Specifying entity inheritance