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Subject: RosettaNet Retry Parameter not Expressible in BPSS or CPP/A
Existing RosettaNet PIPs do not require exactly once delivery semantics. Asynchronous PIPs have a Retry parameter that governs how many additional retries a sender will send a message, if it has not received a Receipt Acknowledgement signal from the other party. Currently, BPSS does not allow for the specification of a retry count. At the CPP/A level, the only available retry parameter is associated with reliable messaging. It is not clear if RosettaNet should always use reliable messaging for all PIPs. Ideally, the DocExchange element should carry an alternate Retry element that is not tied to reliable messaging. Otherwise, it will be great fi extension mechanisms whereby namespace qualified extension elements/attributes can be added. This is an approach that is used both in SOAP and in the Message Service to provide extensibility. -Arvola
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