@Entity
@Table(name = "t_address")
@XmlType(propOrder = ...{"street", "zipcode", "city", "country"})
@XmlAccessorType(XmlAccessType.FIELD)
public class Address ...{

  @XmlTransient
  @Id @GeneratedValue
  private Long id;

  private String street;

  @Column(length = 100)
  private String city;

  @Column(name = "zip_code", length = 10)
  @XmlElement(name = "zip")
  private String zipcode;

  @Column(length = 50)
  private String country;

  @XmlTransient
  @ManyToMany(cascade = CascadeType.PERSIST)
  @JoinTable(name = "t_address_tag",
    joinColumns = ...{@JoinColumn(name = "address_fk")},
    inverseJoinColumns = ...{@JoinColumn(name = "tag_fk")})
  private List<Tag> tags = new ArrayList<Tag>();

  // Constructors, getters, setters
}