systemd (Was Re: tmpfs for strategic directories)

[Bill Nottingham]

Lennart Poettering (mzerqung at 0pointer.de) said: 
> > > Requires=basic.target sockets.target dbus.socket
> > > After=basic.target sockets.target dbus.socket
> > 
> > What does this goop mean and why is it necessary?
> 
> basic.target encapsulates the early boot process (kinda the same stuff
> rc.sysinit currently does). The Requires= make sure that this is pulled
> in by dbus.service. The After= makes sure that it has finished before we
> fork dbus.

How are these evaluated differently that you'd need to list both 'Requires'
and 'After', as opposed to just one? (I would think Requires would imply
After.)

Bill