<billing.information person.href='person.1.xml'>
<credit.card id='c1' type='visa' number='5678567856785678' expires.on='20030130'>
<name>Sam Smith</name>
<us.address object.id='object:account4:0012'>
<street>10 Mars Terrace</street>
<city>Seattle</city>
<state>WA</state>
<zip main='98060' sub='9000'/>
</us.address>
</credit.card>
</billing.information>