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
https://www.liquid-technologies.com/online-xml-to-xsd-converter
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
For example
https://www.minify-beautify.com/online-xml-to-xsd-converter
https://www.minify-beautify.com/online-json-to-xml-converter
Hope it will help some non-IT guys, thanks.