QAK
Query Acknowledgment
The QAK segment contains information sent with responses to a query. Although the QAK segment is required in the responses to the enhanced queries (see section Fehler! Verweisquelle konnte nicht gefunden werden., "Fehler! Verweisquelle konnte nicht gefunden werden."), it may appear as an optional segment placed after the (optional) ERR segment in any query response (message) to any original mode query.
RRequiredOOptionalCConditionalWWithdrawn|#Date/Time*Backward compat.+Filler
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