Hi Marc, Thanks for the response. I have established the roles in the tradeHeader as follows: partyTradeInformation partyReference href=”clearing_firm”/partyReference accountReference href=”account1″/accountReference accountReference href=”book1″/accountReference relatedParty partyReference href=”trade_source”/partyReference role>InputSource/role /relatedParty What my concern is whether the syntax used to establish Parties and Trade information is sufficient to report trades at Level 3 (book) and aggregate positions for margining at level 2 (account) Yes, the Clearing Firms are the beneficiary. Cheers Chad
