SctiesSttlmTxModReq
                Mandatory
                ModfdTxDtls
                Mandatory
                UpdTp
                Repetition (1..3)
                Addtn
                Choice
                Deltn
                Choice
                SttlmTpAndAddtlParams
                Optional
                Lnkgs
                Repetition (0..n)
                TradDtls
                Optional
                FinInstrmAttrbts
                Optional
                QtyAndAcctDtls
                Optional
                SttlmParams
                Optional
                StgSttlmInstrDtls
                Optional
                DlvrgSttlmPties
                Optional
                Pty2
                Optional
                Pty3
                Optional
                Pty4
                Optional
                Pty5
                Optional
                Mandatory
                LEI
                Optional
                AltrnId
                Optional
                IdTp
                Mandatory
                Cd
                Choice
                Prtry
                Choice
                Identification
Id
                Mandatory
                Definition: Proprietary information, often a code, issued by the data source scheme issuer.
Type: Exact4AlphaNumericText (String)
Restrictions:
- Pattern: [a-zA-Z0-9]{4}
Issr
                Mandatory
                SchmeNm
                Optional
                Ctry
                Mandatory
                AltrnId
                Mandatory
                SfkpgAcct
                Optional
                BlckChainAdrOrWllt
                Optional
                PrcgDt
                Optional
                PrcgId
                Optional
                AddtlInf
                Optional
                RcvgSttlmPties
                Optional
                CshPties
                Optional
                SttlmAmt
                Optional
                OthrAmts
                Optional
                OthrBizPties
                Optional
                AddtlPhysOrRegnDtls
                Optional
                SplmtryData
                Repetition (0..n)
                Mod
                Choice