Refer to the preceding text. This image shows a set of four update records returned from the transaction log by ttXlaNextUpdate. It also shows the ttXlaAcknowledge call back to the transaction log. Each of the four update records consists of an update header and data. From left to right, the first of the four update records corresponds to TT_UPDFIRST and the last corresponds to TT_UPDCOMMIT.

End of description.