# Message transformation by Nexus

“Transformation” is different from translation. Whereas translation moves the data unchanged from one message format to another, **transformation in Nexus may actually change the value of some elements of the message**.

Some messages need to be transformed by Nexus after they are received from the Source IPS and before they are sent to the Destination IPS (or vice versa).

Transformation varies depending on the message type but may involve:

* Moving the agents in an instruction (eg changing the Instructing and Instructed Agents after the first leg of the payment has been processed in the Source IPS)
* Converting a currency and payment value from the Source Currency to the Destination Currency (according to exchange rate given in the message, which will be verified against the Nexus quote ID provided in the message)


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