[sane-devel] Setting backend capabilities

[Alexander Pevzner]

Hi,

> I would prefer some kind of backend-to-frontend notification mechanism
> (pub-sub?) over polling but it should be made part of the SANE Standard
> so that all frontends can benefit from it.

My two cents: there is a need for two kinds of asynchronous 
notifications, that can come from backend:
   1) notifications, related to the particular device (button press, for 
example)
   2) notifications, related to the backend itself (hotplug events).

-- 

	Wishes, Alexander Pevzner (pzz at apevzner.com)