RAS vs. RIS (Radar Information/Advisory Service)

[galleypower]

Dear Controllers and other knowledgable people,

Could someone briefly explain me the difference of Radar Information Service (RIS) and radar Advisory Service (RAS)?
And where is RIS mainly used? In airspace where MIL planes and CIVIL planes share the airspace?
As far as I know, RIS only gives you info about other aircraft in the area, but avoidance is up to the pilot and RAS gives you 'full' service, incl. avoidance instructions.

Thanks for your help.
Cheers, galleypower