This article is a follow on to the ?Oracle SOA Suite 11g HL7 Inbound Example?, at In that article the B2B infrastructure was configured to return the ?immediate ack? as soon as it received each message. The ACK was always a positive ACK, regardless of whether the message was valid or not and whether it was successfully processed.

In this article I expand on the previous post by adding the Functional ACK, an explicit ACK message, which is returned after a message is parsed and validated, if validation is required. This means that rather than always returning an ACK the receiver will return a NAK if the message is invalid.

The original article is available at

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