Michael, when writing  ...

"The key difference is that JSON is designed to make it easy for programs to exchange data with each other, whereas XML is designed to represent documents."

could you venture a definition of the term "document" in this context?

And if

<getFlights>

      <departureAirport>CGN</departureAirport>

      <departureDate>2017-08-18</departureDate>

</getFlights>

is a document, as I would suppose (as it falls into the scope XML has been designed for), is

{

      "getFlights": {

            "departureAirport": "CGN",

            "departureDate": "2017-08-18"

      }

}

less so? If not, are those exchanged data not documents?

     

Kind regards,

Hans-Jürgen