Type: int
Specifies the reference amount when this term either corresponds to the standard ISDA Definition (either the 2002 Equity Definition for the Equity Amount, or the 2000 Definition for the Interest Amount), or refers to a term defined elsewhere in the swap document.
See http://www.fixtradingcommunity.org/codelists#Payment_Amount_Relative_To for code list of reference amounts.
Added in protocol FIX.5.0SP2 (208)