Like with JSON, it would be intuitive to be able to directly use a piece of XML to build the mapping.
Today, it’s required to provide the XSD file, and it’s not always easy to find it.
Some tools can generate a XSD file from a XML, this online tool has worked fine in my case
But as a non-professional developer, it took me long time to find this solution.
Above Tool is good, but there are good alternatives also, which you can try
Hope it will help some non-IT guys, thanks.