MIME type of the response returned by the web service.
Hundreds of types are defined in the MIME communication standard (available on the Internet).

• MIME type expressed as a character string. The most common values are:
  • "text/html": HTML page (*.htm, *.html)
  • "text/plain": text file (*.txt)
  • "application/pdf": PDF file (*.pdf)
  • "image/gif": GIF image (*.gif)
  • "image/jpeg": JPEG image (*.jpg, *.jpeg)
  • "video/mpeg": MPEG video (*.mpg, *.mpeg)
  • "application/unknown": displays a dialog box offering to download the file to the user's computer.
  • "application/msword": Opens a Microsoft Word file.
  • "application/vnd.ms-excel": Opens a Microsoft Excel file.
• MIME type corresponding to one of the following constants:
  

  mimeTypeXMLApplication	XML content.
  mimeTypeBinary	Binary content (byte stream).
  mimeTypeDOC	Word file (*.doc)
  mimeTypeDOCX	Word file (*.docx)
  mimeTypeGIF	GIF image (*.gif)
  mimeTypeHTML	HTML page (*.htm, *.html)
  mimeTypeJPEG	JPEG image (*.jpg, *.jpeg)
  mimeTypeJSON	JSON content.
  mimeTypePDF	PDF document (*.pdf)
  mimeTypePNG	Image content in PNG format (*.png)
  mimeTypeSOAP	SOAP content in XML format.
  mimeTypeText	Text (*.txt)
  mimeTypeXMLText	XML text
  mimeTypeXLS	Excel file (*.xls)
  mimeTypeXLSX	Excel file (*.xlsx)
  mimeTypeZIP	ZIP file (*.zip)