---
title: "FIX 5.0 SP2 EP292: LegSecurityIDSource <603> field – FIX Dictionary – Onix Solutions"
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# LegSecurityIDSource <603> field

## FIX 5.0 SP2 EP292

### Description

 Type: [String](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/index.html#String)

 Multileg instrument's individual security's SecurityIDSource.

 See [SecurityIDSource <22>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_22.html) 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>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_1185.html))
- J = Option Price Reporting Authority
- K = ISDA/FpML product URL (URL in [SecurityID <48>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/tagNum_48.html))
- 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)

### Used In

- [<InstrumentLeg>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep292/compBlock_InstrumentLeg.html)

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