tion interface in jakarta.persistence"><code>OneToOne</code></a> 
 mapping in which the primary key of the referencing entity 
 is used as a foreign key to the referenced entity. 

 <p>If no <code>PrimaryKeyJoinColumn</code> annotation is specified
 for a subclass in the <code>JOINED</code> mapping strategy, the
 foreign key columns are assumed to have the same names as the
 primary key columns of the primary table of the superclass.

 <p>Example: <code>Customer</code> and <code>ValuedCustomer</code> subcla