Idempotent

In Messaging this concept translates into a message that has the same effect whether it is received once or multiple times. That is, if the same message is presented to the system for processing more than once, subsequent occurrences will be treated as technical duplicates and discarded. A message is considered the same if a hash of that message creates an identical value to that of a previously received message. For an ISO 20022 message this includes the entire ISO 20022 Business Message, being both Business Application Header (BAH) and the Document part.

_{This document provides general information only. ASX Limited (ABN 98 008 624 691) and its related bodies corporate (“ASX”) makes no representation or warranty with respect to the accuracy, reliability or completeness of the information. To the extent permitted by law, ASX and its employees, officers and contractors shall not be liable for any loss or damage arising in any way (including by way of negligence) from or in connection with any information provided or omitted or from anyone acting or refraining to act in reliance on this information.}