<FpML version="4-1" xmlns="http://www.fpml.org/2004/FpML-4-1" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.fpml.org/2004/FpML-4-1 fpml-main-4-1.xsd http://www.w3.org/2000/09/xmldsig# xmldsig-core-schema.xsd" xsi:type="RequestTradeConfirmation">
...
<trade>
...
<equityOption>
...
<buyerPartyReference href="PartyB"/>
<sellerPartyReference href="PartyA"/>
</equityOption>
</trade>
</FpML>