You should be able to get the documentation from IBM site.
http://www.ibm.com/support/docview.wss?rs=2362&uid=swg24014405. though you might need an IBM id..

We have the DP to get the message in text format and convert to XML format.

Now there is a system1 which puts the messages in text format to MQ and DP connects to this MQ as a client and reads the message and transforms it to XML and another system2 gets the message and process it according to the business rules gives the messages which DP gives to system1.

In this scenario DP connects to QM of system1 and system2 as an Mq client and does not have a QM of its own.

There is another set up checked in the internet  by which there is a middleware set up, which consists of MQ server and DP which manages the messages from system1 and system2.


Please suggest which is better