notify-send flags

[ecvej]

Hi I'm experimenting with notify-send

[ecvej@localhost ~]$ notify-send --help
Usage:
  notify-send [OPTION...] <SUMMARY> [BODY] - create a notification

Help Options:
  -?, --help                        Show help options

Application Options:
  -u, --urgency=LEVEL               Specifies the urgency level (low, normal, critical).
  -t, --expire-time=TIME            Specifies the timeout in milliseconds at which to expire the notification.
  -i, --icon=ICON[,ICON...]         Specifies an icon filename or stock icon to display.
  -c, --category=TYPE[,TYPE...]     Specifies the notification category.
  -h, --hint=TYPE:NAME:VALUE        Specifies basic extra data to pass. Valid types are int, double, string and byte.
  -v, --version                     Version of the package.

I've googled and experimented but I can't figure out what -c and -h flags are used for?

Also I'd like to generate buttons that when clicked perform actions. Is this possible with notify-send? I think the yum-updatesd does something similar, how does that work?

ps I've seen notify-more but as yum-updatesd gets away with doing it with whats on my system I don't want to install something that isn't needed.

[ecvej]

http://www.galago-project.org/specs/...0.9/index.html

[billx]

In case somebody needs :

http://developer.gnome.org/notification-spec/