<?xml version = '1.0' encoding = 'UTF-8'?>
<customer xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:oxm="http://www.example.com/toplink-oxm">
  <contact-method xsi:type="canadian-address-type">
    <id>123</id>
    <street>1 A Street</street>
    <postal-code>A1B 2C3</postal-code>
  </contact-method>
</customer>