The SecurityDefinition(35=d) message is used for the following:
1. Accept the security defined in a SecurityDefinition(35=d) message.
2. Accept the security defined in a SecurityDefinition(35=d) message with changes to the definition and/or identity of the security.
3. Reject the security requested in a SecurityDefinition(35=d) message.
4. Respond to a request for securities within a specified market segment.
5. Convey comprehensive security definition for all market segments that the security participates in.
6. Convey the security's trading rules that differ from default rules for the market segment.
Message structure 4071 distinct fields
Source order, including nested components and groups. Group counts precede the repeated entries. “Required here” is relative to the enclosing component or group, not unconditional in the message. A dash means not marked required; conditional requirements remain in the source notes. This is a reference, not a counterparty-specific validator.
Includes nested components and groups. Escape clears the filter.