@XmlSchema(
        elementFormDefault=XmlNsForm.QUALIFIED,
        attributeFormDefault=XmlNsForm.UNQUALIFIED,
        namespace="urn:customer",
        xmlns={@XmlNs(prefix="ns1", namespaceURI="urn:customer")})
package org.example.customer;
 
import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

package org.example.customer;
 
import javax.xml.bind.annotation.XmlTransient;
 
@XmlTransient
public abstract class Person {
 
    private int id;
    private String name;
 
    @XmlTransient
    public int getId() {
        return id;
    }
 
    public void setId(int id) {
        this.id = id;
    }
 
    public String getName() {
        return name;
    }
 
    public void setName(String name) {
        this.name = name;
    }
 
}

package org.example.customer;
 
import javax.xml.bind.annotation.XmlSeeAlso;
import org.example.employee.Employee;
 
@XmlSeeAlso({Employee.class})
public class Customer extends Person {
 
    private int customerId;
 
    public int getCustomerId() {
        return customerId;
    }
 
    public void setCustomerId(int customerId) {
        this.customerId = customerId;
    }
 
}

package org.example.employee;
 
import org.example.customer.Person;
 
public class Employee extends Person {
}