DFE with Loadrunner

Hi,

I am using Loadrunner 12.02 to test sharepoint 2013 application.

I am receiving web_custom_request("processQuery",......);

The body parameter for this function contains xml request and the URL parameter inside this body paramater contains a query string like url=/_api/search/query?querytext='owstaxIdOn'........

I am not able to correlate data which is present in this URL.

Can DFE be used in this situation?

If yes, How?

If no, what other methods can be used?

Thanks in advance...