Description
Type: String
Used to limit instrument scope to specified security alternate identifier source.
See SecurityAltIDSource <456> field for description.
Valid values:
- 1 = CUSIP
 - 2 = SEDOL
 - 3 = QUIK
 - 4 = ISIN
 - 5 = RIC
 - 6 = ISO Currency Code (ISO 4217)
 - 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 (XML in SecurityXML <1185>)
 - J = Option Price Reporting Authority
 - K = ISDA/FpML product URL (URL in SecurityID <48>)
 - L = Letter of credit
 - M = Marketplace-assigned Identifier
 - N = Markit RED entity CLIP
 - P = Markit RED pair CLIP
 - Q = CFTC commodity code
 - R = ISDA Commodity Reference Price
 - 
                S = Financial Instrument Global Identifier
An Object Management Group (OMG) standard. Also referred to as FIGI. Formerly known as "Bloomberg Open Symbology BBGID".
 - T = Legal entity identifier
 - 
                U = Synthetic
Used to specify that the security identifier is synthetic for linking nested underliers when there is no market identifier for the collection.
 - V = Fidessa Instrument Mnemonic (FIM)
 - 
                W = Index name
Standard name of the index or rate index, e.g. "LIBOR" or "iTraxx Australia.
 - X = Uniform Symbol (UMTF Symbol)
 - Y = Digital Token Identifier (ISO 24165)