NEW ISSUE: semantics of "at most once" delivery assurance

[Tom Rutt <tom@coastin.com>]

*Title*: Semantics of  "At most once" Delivery assurance.

*Description*:
The semantics of the "at most once" delivery assurance are not clear.

One interpretation is that at most once implies that the sender is not 
required to retransmit mesages which are not acked.

*Justification*:
It is important to clarify whether the sender must retransmit 
unacknowledged messages when the "at most once" delivery assurance is in 
use.

*Target*: (core | soap | wsdl | policy | schema | all)
all

*Type: *(design | editorial)
design

*Proposal*:

Clarify the semantics.  There are at least three possible semantics 
associated with "at most once"

proposal 1) at most once means that the sender will never retransmit a 
message, regardless of whether it is acknolweged by the destination.

Proposal 2) The sender may retransmis messages, but is not required to 
to so,  however the destination will not deliver duplicates

Proposal 3) the sender must retransmit messages, however the destination 
may drop messages in times of resource saturation, but will never 
deliver a duplicate.

*Related issues*:
Issue 9

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Tom Rutt	email: tom@coastin.com; trutt@us.fujitsu.com
Tel: +1 732 801 5744          Fax: +1 732 774 5133