LateIndicator (FIX tag 978)

BooleanFIX 5.0 SP2

LateIndicator (tag 978) is a Boolean field defined in FIX 5.0 SP2. It appears in 1 message type, always optionally.

At a glance

Tag: 978
Name: LateIndicator
Datatype: Boolean (char)
Dialects: FIX 5.0 SP2
Messages: 1

What the specification says

Indicates if the contrary intention was received after the exchange imposed cutoff time

Descriptions are quoted from the FIX Orchestra sources under the Apache 2.0 licence.

A real message using tag 978

ContraryIntentionReport · FIX 5.0 SP2

Tag	Field	Wire value	Meaning
8	BeginString	FIXT.1.1
9	BodyLength	95
35	MsgType	BO	ContraryIntentionReport
49	SenderCompID	BOARTEAM
56	TargetCompID	COUNTERPARTY
34	MsgSeqNum	2
52	SendingTime	20240101-12:00:00.000
977	ContIntRptID	EXAMPLE
978	LateIndicator	N
715	ClearingBusinessDate	20240101
10	CheckSum	236

Edit and decode it yourself

Shown with | separators for readability. On the wire FIX uses SOH (0x01), an invisible control byte — and because BodyLength and CheckSum are computed over the actual bytes, the two forms have different checksums. Both are valid and both decode here.

Open in the full decoder →

Generated from the FIX 5.0 SP2 dictionary and verified at build time: it parses and validates with no issues. Open the decoder to try your own message.

Where tag 978 appears

Requiredness is a property of the message, not of the field: the same tag can be optional in one message and conditionally required in another.

Message	MsgType	Requiredness	Where in the message
ContraryIntentionReport	BO	Optional	directly on the message body

Wire format

Y or N. Not 1/0, and not true/false. @boarteam/fix keeps the value as a string and, for enumerated fields, reports validate/value-not-in-enum when it is not a defined value.

Read tag 978 in TypeScript

decode.tsts

import { createFixEngine } from "@boarteam/fix";import { dictionary } from "@boarteam/fix-dict-fix50sp2";const fix = createFixEngine(dictionary);const { message, issues } = fix.parse(raw);const field = message.fields[978];field?.name;   // "LateIndicator"field?.raw;    // the verbatim wire stringfield?.value;  // coerced to a boolean

Decode this in your own code

The same engine that produced the decoded example above is an Apache-2.0 npm package with zero runtime dependencies. It runs in Node and in the browser, and parse() returns problems as data instead of throwing.

npm i @boarteam/fix @boarteam/fix-dict-fix50sp2

Try the decoder Source on GitHub