Deliveries are made to Marketplace by posting XML-formatted data to the endpoint for the corresponding data type.
Responses are returned with a HTTP status code and possibly a body in JSON-format.
As mentioned in validation, a pre-validation is performed on the delivery. This validation is based on a data contract specified in a set of XSD (XML Schema Definition) files.
The location of the schema files is:
Use these files to generate XML and validate against them to avoid submitting invalid data.