The RequestedDeliveryGuarantee parameter with DataType BrokerTransportQualityOfService specifies the delivery guarantees the DataSetReader negotiates with the broker for all messages received. The DataType BrokerTransportQualityOfService is defined in 6.4.2.1.

The value NotSpecified is not allowed on the DataSetReader. If the selected delivery guarantee cannot be applied, the DataSetReader shall set the state to Error.