<billing.information person.href='person.1.xml'> <credit.card id='c1' type='visa' number='1234123412341234' expires.on='20000601'> <name>Bill Jones</name> <us.address object.id='object:account3:0007'> <street>10 Pluto Terrace</street> <city>Chicago</city> <state>IL</state> <zip main='60601' sub='6000'/> </us.address> </credit.card> </billing.information>