<!ELEMENT WUWD (leaseNumber, effectiveDate, bankCode?, amount, checkNumber?, dlsChecksum, principalBalance)> <!ELEMENT leaseNumber (#PCDATA)> <!ELEMENT effectiveDate (#PCDATA)> <!ELEMENT bankCode (#PCDATA)> <!ELEMENT amount (#PCDATA)> <!ELEMENT checkNumber (#PCDATA)> <!ELEMENT dlsChecksum (#PCDATA)> <!ELEMENT principalBalance (#PCDATA)>