SecurityIDSource Field
Valid values:
1 = CUSIP
2 = SEDOL
3 = QUIK
4 = ISIN number
5 = RIC code
6 = ISO Currency Code
7 = ISO Country Code
8 = Exchange Symbol
9 = Consolidated Tape Association (CTA) Symbol (SIAC CTS/CQS line format)
A = Bloomberg Symbol
B = Wertpapier
C = Dutch
D = Valoren
E = Sicovam
F = Belgian
G = "Common" (Clearstream and Euroclear)
H = Clearing House / Clearing Organization
I = ISDA/FpML Product Specification
J = Options Price Reporting Authority
100+ are reserved for private security identifications