Renaming of files by MDM Server (MDM 5.5 SP4)

Hi Experts,

I am checking the MDM Server Logs and found that there is always renaming of files happening from ".tmp" to ".xml" as shown below:

7560 2011/09/13 15:39:16.773 GMT SyndicateToPortImpl: rename files (0) "C:\PROGRA_1\SAPMDM1.5\Server\Distributions\MR4_ORCL\BP US FUELS CUSTOMER MASTER_PRD\Outbound\SCDB_BP\Modify_BP_SCDB\Ready\Data_110913-153916_000.tmp"

to

"C:\PROGRA_1\SAPMDM1.5\Server\Distributions\MR4_ORCL\BP US FUELS CUSTOMER MASTER_PRD\Outbound\SCDB_BP\Modify_BP_SCDB\Ready\Data_110913-153916_000.xml".

Can someone tell me why this renaming of files is happening?

Thanks!