<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>