Talend ESB : How to validate XML request against a XSD file - talend

I am using Talend Open Studio 5.4.
I have created a service, which on finish generates all schema required for the same service. I have assigned a new job for the service and trying validate input XML request against the request XSD file.
I followed this link, it worked fine, but when I tried to validate an input XML request, as tESBProviderRequst will receive, it did not work.
How to do it?

I'm not a Talend expert, but the way i do this is by transforming first my payload (which type is a "document") into a string, so that the tXSDValidator could work.
The second conversion is just here to allow me to build a custom response with my input fields.
But in any cases, i think you have to pass a document object to your tESBProviderResponse.
I hope it helps.

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I have tried to find a solution in this community in different threads but yet to find one that I am looking for.
I am using SoapUI version 5.3.0 My Application have a couple of RESTful APIs. Initially I am sending json request to a WebService and getting back the following XML Response:
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Update:
I have created a 'Property Transfer' at Testsuite level as "TSreqNum". This 'Property Transfer' is getting updated as per the initial Response. But I am not sure how would I append "TSreqNum" to construct the complete GET Request as:
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