It s possible to extend the fixed fields in a schema. The specification indicate that we just need to prefix the extra fields with "x-". It s a good point if we want to specified spécific informations - per example the data source of a field.
But, in the produced documentations, at the end, we never see this extra fields.
My suggestion is, optionnaly, we can add/display this extra fields in the final documentation.
Currently, this is what we have :
We can expect that we can see the extra field x-dataSource in the documentation.