TagField NameAbbr NameData TypeUnion DatatypeDescriptionPedigree

For bid lists, unique identifier for BidResponse(35=I) as assigned by sell-side (broker, exchange, ECN). Uniqueness must be guaranteed within a single trading day.
For quotes, unique identifier for the bid side of the quote assigned by the quote issuer.

Added FIX.4.2 Updated EP144

Used in messages: