BuyInRgltryAdvc
                Mandatory
                AcctOwnr
                Optional
                SfkpgAcct
                Mandatory
                BuyInAttrbts
                Repetition (1..n)
                Ref
                Mandatory
                AcctOwnrTxId
                Optional
                AcctSvcrTxId
                Optional
                MktInfrstrctrTxId
                Optional
                PrcrTxId
                Optional
                PoolId
                Optional
                CmonId
                Optional
                Trade Identification
TradId
                Optional
                Definition: Reference assigned to the trade by the investor or the trading party. This reference will be used throughout the trade life cycle to access/update the trade details.
Type: Max52Text (String)
Restrictions:
- MinLength: 1
- MaxLength: 52
BuyInStat
                Mandatory
                BuyInDfrrl
                Mandatory
                FinInstrmId
                Optional
                Qty
                Optional
                BuyInPric
                Optional
                CshCompstnAmt
                Optional
                BuyInSttlmDt
                Optional
                SplmtryData
                Repetition (0..n)