hal

[Martin Pitt]

Hello tangke,

tangke [2009-07-22  9:51 +0800]:
> hi all, I am a beginner of this field, now i am looking some documents 
> about the hal.

<jedi wave>This is not the program you are looking for</jedi wave>

Seriously, hal is currently being deprecated [1][2], so I don't
recommend to base new applications on it.

[1] http://lists.freedesktop.org/archives/hal/2008-May/011560.html
[2] https://wiki.ubuntu.com/Halsectomy

> i don't know what's means of info.addons, info.callouts.add etc.

Have a look at the spec, which explains those:

http://people.freedesktop.org/~david/hal-spec/hal-spec.html

Martin
-- 
Martin Pitt                        | http://www.piware.de
Ubuntu Developer (www.ubuntu.com)  | Debian Developer  (www.debian.org)