<billing.information person.href='person.1.xml'>
<credit.card id='c1' type='visa' number='1234123412341234' expires.on='20000601'>
<name>Jane Smith</name>
<us.address object.id='object:account2:0007'>
<street>10 Saturn Terrace</street>
<city>New York</city>
<state>NY</state>
<zip main='10001' sub='1000'/>
</us.address>
</credit.card>
</billing.information>