---
title: "FIX 5.0 SP2 EP299: SecurityDefinition <d> message – FIX Dictionary – Onix Solutions"
description: "<meta name=\"description\" content=\"SecurityDefinition&lt;d&gt; message &ndash; FIX 5.0 SP2 EP299, FIX protocol version FIX 5.0 SP2 EP299\" /> <meta name=\"keywords\" content=\"message, SecurityDefinition, MsgType=d, FIX 5.0 SP2 EP299, FIX Protocol, FIX dictionary\" />"
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# SecurityDefinition <d> message

## FIX 5.0 SP2 EP299

### Description

 The Security Definition message is used for the following:

1. Accept the security defined in a Security Definition message.
2. Accept the security defined in a Security Definition message with changes to the definition and/or identity of the security.
3. Reject the security requested in a Security Definition 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.

 Security Definition

### Structure

| Tag | Field Name | Req'd | Comments |
| --- | --- | --- | --- |
| [Component Block - <StandardHeader>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardHeader.html) | Y | [MsgType <35>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_35.html) = d (lowercase) |  |
| [Component Block - <ApplicationSequenceControl>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_ApplicationSequenceControl.html) | N |  |  |
| 964 | [SecurityReportID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_964.html) | N | Identifier for Security Definition message |
| 715 | [ClearingBusinessDate](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_715.html) | N |  |
| 320 | [SecurityReqID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_320.html) | N |  |
| 2422 | [OrderRequestID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2422.html) | N |  |
| 322 | [SecurityResponseID](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_322.html) | N | Identifier for the Security Definition message |
| 323 | [SecurityResponseType](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_323.html) | N | Response to the Security Definition Request |
| 560 | [SecurityRequestResult](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_560.html) | N | Allow result of query request to be returned to requester |
| 1607 | [SecurityRejectReason](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_1607.html) | N | Used to specify a rejection reason when [SecurityResponseType <323>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_323.html)=5 (Reject security proposal). |
| 292 | [CorporateAction](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_292.html) | N | Identifies the type of Corporate Action |
| [Component Block - <Instrument>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Instrument.html) | N | Insert here the set of "Instrument" (symbology) fields defined in "Common Components of Application Messages" of the requested Security |  |
| [Component Block - <InstrumentExtension>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_InstrumentExtension.html) | N | Insert here the set of "InstrumentExtension" fields defined in "Common Components of Application Messages" |  |
| [Component Block - <FinancingDetails>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_FinancingDetails.html) | N |  |  |
| [Component Block - <UndInstrmtGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_UndInstrmtGrp.html) | N | Number of underlyings |  |
| [Component Block - <RelatedInstrumentGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_RelatedInstrumentGrp.html) | N |  |  |
| [Component Block - <SecurityClassificationGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_SecurityClassificationGrp.html) | N | Used to specify forms of product classifications |  |
| 15 | [Currency](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_15.html) | N | Currency in which the price is denominated |
| 2897 | [CurrencyCodeSource](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2897.html) | N |  |
| 2572 | [PreviousAdjustedOpenInterest](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2572.html) | N |  |
| 2573 | [PreviousUnadjustedOpenInterest](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2573.html) | N |  |
| 734 | [PriorSettlPrice](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_734.html) | N |  |
| 58 | [Text](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_58.html) | N | Comment, instructions, or other identifying information. |
| 354 | [EncodedTextLen](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_354.html) | N | Must be set if EncodedText field is specified and must immediately precede it. |
| 355 | [EncodedText](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_355.html) | N | Encoded (non-ASCII characters) representation of the Text field in the encoded format specified via the MessageEncoding field. |
| [Component Block - <Stipulations>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_Stipulations.html) | N |  |  |
| 1606 | [NumOfSimpleInstruments](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_1606.html) | N |  |
| 2562 | [NumOfComplexInstruments](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2562.html) | N |  |
| [Component Block - <InstrmtLegGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_InstrmtLegGrp.html) | N | Number of legs that make up the Security |  |
| [Component Block - <SpreadOrBenchmarkCurveData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_SpreadOrBenchmarkCurveData.html) | N |  |  |
| [Component Block - <YieldData>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_YieldData.html) | N |  |  |
| [Component Block - <MarketSegmentGrp>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_MarketSegmentGrp.html) | N | Contains all the security details related to listing and trading the security |  |
| 779 | [LastUpdateTime](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_779.html) | N | Represents the time at which a security was last updated |
| 2400 | [EffectiveBusinessDate](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_2400.html) | N |  |
| 60 | [TransactTime](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/tagNum_60.html) | N |  |
| [Component Block - <StandardTrailer>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/compBlock_StandardTrailer.html) | Y |  |  |

### Related Messages

- [Reject <3>](https://www.onixs.biz/fix-dictionary/5.0.sp2.ep299/msgType_3_3.html)

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