Proper use of HTTP status codes in a “validation” server

Question

Among the data my application sends to a third-party SOA server are complex XMLs. The server owner does provide the XML schemas (.xsd) and, since the server rej

Answer 1

I'd go with 400 Bad request and a more specific message in the body (possibly with a secondary error code in a header, like X-Parse-Error: 10451 for easier processing)