dBy</code> element to indicate the relationship attribute within the
 embedded attribute.  The value of each identifier used with the dot
 notation is the name of the respective embedded field or property.
 
 <pre>
    Example 1: One-to-one association that maps a foreign key column

    // On Customer class:

    &#064;OneToOne(optional=false)
    &#064;JoinColumn(
        name="CUSTREC_ID", unique=true, nullable=false, updatable=false)
    public CustomerRecord getCustomerRecord() { return customerRecord;