The MIME type shall be one on the MIME types defined in the contentType parameter, preferably the most desired by the Web Client, and shall be in any case compatible with the ‘Accept’ field of the GET method.
Note: The HTTP behavior is that an error (406 – Not Acceptable) is returned if the required content type cannot be served.
The content shall be a single MIME part containing the object to be retrieved.
Note: Multiple objects in a response are not supported by this standard. The parameters select only a single object to retrieve. Most current Web Clients are able to retrieve single objects, within a "non multipart" MIME body, and are not able to support multipart/related or multipart/mixed responses.