Similar to how most modern network printers support "driverless" printing, using the universal vendor-neutral printing protocol, many modern network scanners and MFPs support "driverless" scanning.

Driverless scanning comes in two flavors:

* Apple AirScan or AirPrint scanning (official protocol name is eSCL) * Microsoft WSD, or WS-Scan (term WSD means "Web Services for Devices)

This backend implements both protocols, choosing automatically between them. It was successfully tested with many devices from Brother, Canon, Kyocera, Lexmark, Epson, HP, Ricoh, Samsung and Xerox both in WSD and eSCL modes.