5.4.6 <beapolicy:QOS>

Specifies the delivery assurance. SALT supports the following assurances:

• AtMostOnce - Messages are delivered at most once, without duplication. There is possibility that some messages may not be delivered.
• AtLeastOnce - Every message is delivered at least once. There is possibility that some messages are delivered more than once.
• ExactlyOnce - Each message is delivered exactly once, without duplication.
• InOrder - Messages are delivered in the order that they were sent. This delivery assurance can be combined with one of the preceding three assurances.

The default value is "ExactlyOnce InOrder".