<customer phone="888.555.1234"
  xmlns="http://www.sosnoski.com/ns1">
  <ns2:person ns2:cust-num="123456789"
    xmlns:ns2="http://www.sosnoski.com/ns2">
    <ns2:first-name>John</ns2:first-name>
    <ns2:last-name>Smith</ns2:last-name>
  </ns2:person>
  <street>12345 Happy Lane</street>
  <city>Plunk</city>
  <state>WA</state>
  <zip>98059</zip>
</customer>
