Launch e.g. notification-daemon as needed?

[Jack Bates]

I'm not super familiar with the D-Bus architecture -- if someone calls 
an interface that requires a daemon, should that daemon get launched as 
needed?

Currently if I send a desktop notification and notification-daemon isn't 
running, nothing happens ... I'm wondering if I should expect D-Bus to 
launch notification-daemon as needed, or if it's normal to have to do 
that manually ... (LXDE is still using notification-daemon.)

Thanks!