<FpML version="4-0" xmlns="http://www.fpml.org/2003/FpML-4-0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.fpml.org/2003/FpML-4-0 fpml-main-4-0.xsd" xsi:type="TradeAffirmation">
...
<trade>
...
<swap>
<swapStream>
<payerPartyReference href="MSDW"/>
<receiverPartyReference href="MGTLONDON"/>
</swapStream>
<swapStream>
<payerPartyReference href="MGTLONDON"/>
<receiverPartyReference href="MSDW"/>
</swapStream>
<additionalPayment>
<payerPartyReference href="MSDW"/>
<receiverPartyReference href="MGTLONDON"/>
</additionalPayment>
</swap>
</trade>
</FpML>